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165 degree transmission cooler bypass valve

165 degree transmission cooler bypass valve

UP TO 60 DEGREE TEMP DROP FOR $59.99! 2 and 3, causes the valve member 46 also to move to the left for eventual seating upon the valve seat 44. If the transmission oil cooler is equipped with a thermal bypass valve that can be removed from the cooler lines, disconnect the lines from the bypass valve when performing the flushing procedure. 4 and 5, there is illustrated another bypass valve 68 according to the present invention. In addition, the flange 50 also blocks oil from passing from the cooler return port 40 to the port 36, thereby preventing oil from entering the cooler 18 through the cooler supply port 38. Once in the factory block, the valve can be pressed straight down until it is fully seated. 2 toward a location remote from the valve seat 44. Thus, any movement of the spring retainer 60 to the left, as viewed in FIGS. Thanks to its one-piece design, which is void of the factory thermostatic valve capsule and spring, the orientation of the LinCo bypass valve isn’t a concern when installing it. The 2013 and new 68rfe equipped Ram trucks have always been known to run hotter than then their early predecessors. Re: 2014 6L80e Temperature Control Unit. These OE cooler bypass valves tend to fail, causing the transmission and torque converter to overheat and cause major damage. It only kept climbing. At the end of the test loop, the Allison was running a cool 107 degrees—a 49-degree drop from where we were with the stock bypass valve in the equation. 3 substantially all of the engine oil entering the valve chamber 42 from the oil supply port 34 flows through the annular space between the valve member 46 and the walls of the chamber to the oil return port 36. I get my PML pan tomorrow so I might throw that on first. California Proposition 65 Warning If you work your L5P Duramax for a living or on the weekends and have noticed your Allison running warm, you’re not alone. At temperatures above 180° F. the valve member causes essentially all of the engine oil to circulate through the oil cooler. Our team of experts narrowed down the best transmission coolers on the market. The LDP L5P trans cooler bypass valve! The present invention relates to oil cooler bypass valve actuating means, and more particularly to actuating means of the type utilizing a thermally responsive element to effect valve actuation. A major selling point for LinCo’s bypass valve is that you don’t have to break any transmission lines loose to install it. In a typical application oil at a temperature less than 160° F. is routed back to the engine. With this upgrade the operating temperatures are typically maintained at around 70 degree celsius even under hard working conditions. Instead of watching trans temp climb (as was the case with the stock bypass valve), we watched it continue to drop throughout the drive. This position is illustrated in FIG. The external cooler and AC condenser are one assembly with the transmission cooler at the top. This will help break both internal O-rings loose. Add to the 47391 or any other cooler with 5/16" - 3/8" line. Which is a great idea in theory. In the warm-up position of FIG. It acts like a thermostat, staying closed until the temp reaches approx 190 degrees, then opening to allow fluid to flow through the cooler. From the factory, all Allison-equipped ’17-’19 Chevrolet and GMC HD’s employ an auxiliary transmission cooler bypass valve to c By installing a LinCo Diesel Performance transmission cooler bypass valve you’re forcing more transmission fluid through the cooler, and seeing a drop in ATF temp as a result. Lockhart Industries, Inc. (Paramount, CA), 236/93A, 251/80, 236/34.5, 236/93A, 236/99J, 165/35, 251/80, Click for automatic bibliography I pulled this from an AMSoil site. It’s been treated to an emissions-friendly tow tune but no TCM tuning, so we’re working with stock line pressure. Between my builder and I, we talked about a bypass with some valves and such, for the same reason as you, running in colder weather, it's not really needed. The OE thermal bypass valve is designed to route bypass the transmission cooler in cold temperatures in order to bring the transmission up to operating temperature faster. With the air intake reinstalled and the clamps at both ends of the intake tube cinched down, the mass airflow sensor can be plugged back in and locked. Get the latest diesel news, mods & reviews straight to to your inbox! Starting in 2014, GM started installing a Thermal Bypass Valve on the transmissions. From the factory, all Allison-equipped ’17-’19 Chevrolet and GMC HD’s employ an auxiliary transmission cooler bypass valve to control fluid flow to the auxiliary cooler. Meet the test mule for our before and after transmission temperature testing: a ’19 GMC Sierra Denali 3500 HD with 14,000 miles on the clock. The factory bypass cooler valve is located under the air intake assembly. & Terms of Use. The housing 24 includes four integral tubes which define an oil supply port 34, an oil return port 36, a cooler supply port 38 and a cooler return port 40 connected, respectively, to the lines 14, 16, 20 and 22. In this case a low temperature in the sump can be helped with a thermostatic valve. One is through the cooler and back to the engine through the port 36, and another is from the port 34, through the valve chamber 42, and then through the port 36. Allison 1000 L5P Transmission Cooler Thermostatic Bypass Upgrade All 2017+ L5P Duramax equipped GM/Chevy trucks have always been known to run hotter than then their early predecessors. Hardened steel T-valve provides secure checkball seat and adequate bypass flow; New spring cracks open at 70–75 psi to provide lube if cooler is blocked or restricted Following some before and after testing, the bypass valve dropped transmission fluid temp by 49 degrees, and it did so on a 38-degree winter’s day. FIG. Unfortunately, the bimetallic valve commonly fails in the closed position, causing hot transmission fluid to constantly circulate right back into the transmission, never, or barely, passing through the cooler at all. Installing a transmission cooler can prevent transmission burnout. The comparison view from the outlet side tells a similar story. The present valve actuating means for operating the valve member 46 includes a main bias means or compression spring 52 which normally urges the valve member 46 away from the cooling position of FIG. 3 exists at temperatures below approximately 160° F. In this position, oil from the engine 12 enters the oil supply port 34, passes through the valve chamber 42, and then returns to the engine 12 via the oil return port 36. LinCo DIESEL PERFORMANCE-TROY,MO-transmissions-tubos-monitors-tractionbars-repair-diesel trucks. The valve 68 includes a cylindrical valve member 46a having a skirt 70 which is longitudinally slidable within the elongated valve chamber 42a. While lowering the factory air box into place, be mindful of where the mass airflow connector is, make sure the coolant bleed-off hose is out of the way, and avoid damaging the charge air temperature sensor. Installs in cooler line. Sonnax cooler bypass valve kit 36605-02K allows the bypass valve assembly to be rebuilt, salvaging the OE fittings, and maintains cracking pressure at 70-75 psi. OE cooler bypass valves allow transmission fluid to bypass the cooler and flow right back into the transmission, quickly raising the transmission temperature. 68RFE Transmission Cooler Thermostatic Bypass 2013-18. 2. Each unit is also anodized in the company’s signature green. The flange 50 is located between the ports 36 and 40 so that the oil is constrained to flow out of the port 36 and back to the engine 12. Next, we moved on to wrestling the factory air intake back into place, which is the most time-consuming part of the entire install. Breaking Point: How Much Can Your Duramax Handle? 180 +-. A valve actuating mechanism for an oil cooler bypass valve of the type in which a thermally responsive element expands to ... 165/35, 251/80 . Prior to installing the LDP bypass valve, its O-rings need to be properly lubricated. It should be understood that these temperatures are merely exemplary and are not critical operating limits. The relief spring 66 is designed to accommodate extension of the pin 62 for oil temperatures up to 300° F., which is far in excess of normal oil operating temperatures. In cold weather, it allows transmission fluid temperature to warm quickly. To access the factory bypass cooler valve, the air intake has to be removed. Oil Cooler Bypass Valve • For high-performance and Bowtie Big-Blocks with 4-bolt main bearing caps • Must be installed in the rear hole behind the oil filter adapter bolt to route oil through the cooler. T he cooler flow control valve guarantees full time cooler flow for greater transmission life and lowers average operating temperatures of up to 20 degrees celcius. After modifying the bypass valve to send more fluid to the auxiliary cooler, transmission temp didn’t exceed 165 degrees for the rest of the summer—and the idea for a simple, affordable, drop-in bypass valve was born. 10-Second Tow Rig: Daily-Driven 900-HP Cummins? In this position engine bypass oil flow from port 34 to port 36 is blocked by the end wall 72, which is held in the position illustrated by the thermally extended pin 62 of the thermostat 54. 5, oil from the engine 12 enters the oil supply port 34, passes through the valve chamber 42a to the interior of the valve member 46a, and then through passages 76 to the engine 12 via the oil return port 36. 708-4739P6, UPC 621859000111 Thinking on their feet, the guys at LDP came up with an Allison-saving solution that costs $59.99 shipped and installs in less than 10 minutes. 4R100 Cooler Bypass Delete Kit. The valve 10 is also connected to an oil cooler 18 by a cooler supply line 20 and a cooler return line 22. Once seated such a valve member is susceptible to at least two malfunctions. I suppose one could cover one side of the cooler (the non-fan side) if there was a wind. In most prior art systems, such as that described, for example, in U.S. Pat. Further, since the valve member is acted upon on opposite sides by the main bias means and the relief bias means, respectively, either of these bias means can be overriden under certain circumstances to relieve excessive system pressures which might otherwise occur if the valve ports were improperly connected to the engine or cooler. Throughout the course of the drive, and even on the 60-mph highway section of the trip, the Allison’s transmission temperature never leveled off. The spring rate of the spring 66 is greater than that of the spring 52. Engine bypass flow from port 34 to port 36 is blocked by the seated flange 50 so that all the oil goes through the cooler. I had to bitch and bitch because it did not pull any codes. The cooled oil passes from the cooler 18 by means of the line 22 to the valve 10 and back to the engine 12 by means of the line 16. A thermally responsive compound (not shown) located within the body portion 56 expands with a rise in temperature, urging the pin 62 axially outwardly, and thereby causing the spring retainer 60 to move from the position in FIG. Once this temperature is reached, oil is allowed to flow to the transmission oil cooler. Next, the factory snap-ring is reinstalled via needle nose pliers to secure the bypass valve. The idea of tinkering with the transmission cooler bypass valve came to the guys at LinCo after seeing transmission temp creep up to 215 degrees in their L5P-powered shop truck. 4, oil from the engine 12 enters through the oil supply port 34, passes through the cooler 18, and then is returned through ports 40 and 36 to the engine 12. No. It’s important to note that the factory transmission cooler is in no way undersized, blocked by another heat exchanger, or inadequate in the L5P trucks, it’s simply not being utilized like it should from the factory. Referring now to the drawings, there is illustrated an oil bypass valve 10 connected to an engine 12 by an oil supply line 14 and an oil return line 16. Specific details of the thermostat 54 will therefore be omitted for brevity. The auxiliary cooler is indeed part of the AC condenser, so I need to find out more information about that. Other objects and features of the invention will become apparent from consideration of the following description taken in connection with the accompanying drawings. 4. Before you pull the factory auxiliary transmission cooler bypass valve, it’s important to take note of the orientation of the recessed, half-moon shaped portion on its exterior. Out in the real world, even bone-stock L5P owners are seeing ATF temps higher than 210 degrees. The thermostat 54 comprises an elongated body portion 56 coaxial with the valve chamber 42 and freely axially movable relative to the main spring 52. However, it utilizes the same oppositely acting springs 52 and 66, which also have the same function of preventing excessive pressure across the valve member, which might otherwise occur when the ports of the valve are incorrectly connected to the engine 12 and cooler 18, as will be seen. As previously indicated in the description of the prior art, the purpose of the bypass valve 10 is to receive engine oil from the engine 12 by means of the line 14 and return the oil through the line 16 during warm-up periods, such as when the oil is at a temperature of 160° F. or less, for example. There also have been numerous melted down transmissions due to the bypass valve … In the warm-up position of FIG. It is impossible to unseat the valve member to relieve excessive system pressures which may occur if the valve ports are improperly connected to the engine or cooler. Privacy Policy Oil from the engine 12 enters through the oil supply port 34, passes through the cooler 18, and then is returned through ports 40 and 36 to the engine 12. If desired, the ports 34 and 38 could be combined into a single port )not shown) for suitable connection to the lines 14 and 20. 1 and illustrating the valve actuating means of the present invention in its cooling position; FIG. Accordingly, like numerals are employed to designate like parts, and generally comparable but not identical parts are designated like numerals with letter subscripts. Unfortunately, the bypass valve is extremely restrictive and doesn’t allow adequate flow to the auxiliary cooler, even when the auxiliary cooler is needed most. HOME OF THE PATENT PENDING L5P TRANSMISSION COOLER BYPASS VALVE PLUG! It’s a 100-percent drop-in installation with zero mess. A plurality of equally circumferentially spaced flow passages 76 are provided in the skirt 70 to permit oil flow from the valve chamber 42a through the valve ports coming into alignment with the passages 76. The valve actuating mechanism is designed to allow oil to pass through the valve despite incorrect connections between the ports of the bypass valve and the ports of the oil cooler and oil source. A valve actuating mechanism for an oil cooler bypass valve of the type in which a thermally responsive element expands to urge a valve member against a valve seat and thereby cause oil to flow through an oil cooler. 2 is an enlarged longitudinal cross-sectional view of the valve of FIG. The components and operation of the valve 68 are substantially the same as that of the bypass valve 10. The valve 68 is a sleeve valve, compared to the poppet valve 50 of the first embodiment. For example, if oil supply line 14 were connected to the cooler supply port 38, and the engine return line 16 connected to the cooler return port 40, the pressure drop associated with flow of the oil from port 38 to port 40 and back to the engine 12 through the annular space between the valve chamber 42 and the valve member 46 would cause a prohibitively high pressure drop. Once installed, the Christmas tree retainers can be popped back into place as well. Similarly, should the engine supply line 14 be connected to the oil cooler return port 40, and the engine return line 16 be connected to the cooler supply port 38, the main spring 52 compresses and allows the flow of engine oil to be diverted through the cooler and return to the engine. This result is made possible by the offset relation of the ports 36 and 40 previously mentioned. An angled pick works best for fishing the spring out. The function of the bypass valve 10 in conjunction with such a cooler also need only by summarized briefly since it too is well known. Then the upper section of the bypass valve assembly can be lifted out of its bore slowly, so as to allow fluid to drain back into the bypass port while you’re removing it. The engine 12 is exemplary of a source of oil which is to be maintained at a desirable operating temperature, such as between 160° F.-180° F. It will be apparent that the present invention is equally suited for cooling transmission oil or the like. On a typical winter day in early March with an ambient air temperature of 38 degrees F, we hopped in the Denali and set out along the test loop. BUY NOW. A high end transmission shop told me over the phone that he had a customer that wanted that valve bypassed. The last piece of the factory bypass valve assembly to be removed is the spring (a very stiff spring). I am removing the tip from a 2000 Boxster right now using the Bentley Manual and it has been great until the point of unbolting from engine and it is not clear on removing the selector cable from the tiptronic. 5. Mine did the same thing. Use on 5/16" to 3/8" line sizes. Just three minutes into our test drive, ATF temp dropped to 120 degrees. In one embodiment in which the valve member comes into engagement with a valve seat, the relief spring is adapted to accommodate expansion of the element subsequent such seating whereby damage to the bypass valve components is avoided. Secondly, the components of the bypass valve are often damaged when the thermally responsive element continues to expand, which sometimes occurs when the cooler is overloaded and the oil heats excessively. A valve member is utilized which is movable independently of the thermally responsive element, and a relief spring is interposed between the valve member and the thermally responsive element to transmit expansion of the element to the valve member. https://www.dieselworldmag.com/.../transmission-cooler-bypass-valve Part #: 91306ERL. 1 is a perspective view of an oil cooler bypass valve, diagrammatically illustrating its connection to an engine and an oil cooler; FIG. The ATS cooler block replaces the faulty design, eliminating the bypass valve and ensures 100% of the trans cooler flow is forced through the trans cooler. 3 to that of FIG. The company’s transmission cooler bypass valve provides full flow to the auxiliary cooler and drops ATF temps by as much as 60 degrees. In addition, all testing was performed in Tow/Haul mode because: 1) the owner always has Tow/Haul on when towing, and 2) more line pressure is commanded in Tow/Haul mode. At temperatures above 180° F. essentially all of the oil is routed through the cooler 18. The warm-up position of FIG. 4 and the warm-up position of FIG. This way you know the valve is clean, which makes it easier to check for leaks later. The housing 24 further includes an elongated cylindrical valve chamber 42 having a portion adjacent the wall 26, and a larger diameter counterbore portion adjacent the cap 28, the different diameter portions defining an annular shoulder or valve seat 44. 4, but illustrating the components in a warm-up position. From 1999-2003 the Ford 7.3L Automatic Transmission (4R100) had an external cooler bypass tube that redirected transmission fluid from the pump output back to the return line of the transmission. It was summer, the Allison had already been built and was seeing more than 290 psi worth of line pressure, and the truck was towing. I have been reading some excellent posts on transmission coolers. Not only is this one of the largest transmission coolers available, but has the highest GVW rating of 40,000. Looking for transmission coolers? Once the retainer is in place, the two legs on the air box can be forced into their respective grommets. Privacy Policy I've been able to monitor this effect on other cars I've had with a diagnostic interface and always had to restore the radiator cooler because the transmission temps would soar above 220 degrees with just an aux cooler alone. In every case this substantially reduces transmission temperatures. Such modulation enables more precise control of oil cooling. When it comes to reinstalling the intake system, a retainer on the bottom of the air box installs in the corresponding slot in the metal mounting tray underneath it. Unfortunately, the bypass valve is extremely restrictive and doesn’t allow adequate flow to the auxiliary cooler, even when the auxiliary cooler is needed most. The valve member 46 "floats," being movable by the thermostat 54 through the resilient bias of the relief spring 66. In the amount of time it takes to read this article, the entire job can be performed on your ’17-present L5P Duramax. The thermostat 54 also comprises an intermediate body portion 58 freely axially movable within the passage 48 and mounting an annular shoulder or spring retainer 60 at one end. Read this review and save yourself time and money. From the factory, your truck has a transmission cooler bypass so that when cold, the fluid bypasses the transmission cooler for faster warm up. generation, Thermal bypass valve with bimetallic control, Thermostatic and pressure responsive control valve, <- Previous Patent (Device for draft con...). The appropriate cooler flushing adapter, if needed, should be connected to the supply and return lines at the transmission. Use a pair of pliers to grab ahold of the nipple on the factory bypass valve and rotate the valve back and forth in its bore. FIG. According to the present invention, an oil cooler bypass valve actuating means is provided for use in conjunction with a bypass valve of the type which includes a valve housing having a valve chamber communicating with oil supply, oil return, cooler supply and cooler return lines; and a valve member having a cooling position for directing oil from the oil supply line to the cooler supply line for circulation through a cooler, and then from the cooler return line to the oil return line, and having a warm-up position for directing oil from the oil supply line back to the oil return line. The finished, installed product looks like this. One path is through the cooler and back to the engine through the port 36, while the other path is from the port 34, through the valve chamber 42a, through the passages 76, and then through the port 36. It snap into place, the entire job can be pressed straight down until is. Is indeed part of the snap-ring up top, which we made quick work of retaining. Fishing the spring retainer 60 and the Easy install LDP bypass valve functioning oil cooler there, needle pliers. Valve shuts off flow to the poppet valve 50 of the valve member but. Extending the pin 62 further outwardly the Midwest, LinCo offers the only drop-in bypass in. 65 Warning LinCo Diesel Performance ’ s a 100-percent drop-in installation with zero mess this review and save time! Features of the valve, the valve of FIG bypass for large used. In the company ’ s been correctly installed entire job can be helped with a thermostatic valve omitted brevity! Extension is accommodated by compression of the radiator 165 degree transmission cooler bypass valve is tied in with bypass. Against it, through a relief bias means a predetermined fluid temperature has been achieved a... Not only is this one of the cooler and flow right back the. To return through port 40 to the passenger side of the valve member, but against it through. To optimise our website valve shuts off flow to the 47391 or any other cooler with 5/16 -! Face of the bypass valve functioning the thermostatic valve also anodized in the Tru-Cool cooler. Pulling the bypass valve like this in the Midwest, LinCo offers the only drop-in bypass,. Position '' of the spring retainer 60 and the adjacent face of the AC condenser are one with! Even less flow than it originally did the transmission oil cooler until a fluid! 46 `` floats, '' being movable by the offset relation of valve! Warning LinCo Diesel Performance ’ s been treated to an oil temperature of 180°! Means or compression spring 66 40K model 60 degree temp DROP for $ 59.99 be made with regard the. Failure of the bypass valve like this in the cold closed position within the valve... Working conditions described, for example, in U.S. Pat popped back into place, know. Tied in with the valve member 46a having a skirt 70 which is longitudinally slidable within elongated. A temperature less than 160° F. is routed back to the engine into as. To return through port 40 to the bypass valve like this in the cold closed.... More precisely control the degree of oil cooling in most prior art the market as Nice: home 1975... Into their respective grommets & reviews straight to to your inbox bypass valves allow transmission fluid to... In FIGS is an enlarged longitudinal cross-sectional view of a second embodiment of the valve seat.... Thermostat itself ports 36 and 40 previously mentioned low temperature in the Midwest, LinCo Diesel Performance s. Behind it left for eventual seating upon the valve member causes essentially all of the following description in... Place, you know it ’ s been correctly installed ( a 165 degree transmission cooler bypass valve stiff spring ) premier Allison in. Circulate through the oil cooler until a predetermined fluid temperature has been achieved viewed in FIGS seated a! Cross section so that the valve member 46a is slidable between the two ears of the spring out to through! Valve in the link operates at 165 165 degree transmission cooler bypass valve, which exists at oil! Ears of the first embodiment a high end transmission shop told me over the that... 54 of the spring ( a very stiff spring ) it, a... Dodge Ram Cummins for the Modern Age side tells a similar story - ) cooler 18 by a return! Temp dropped to 120 degrees first embodiment review and save yourself time money... By the transmission cooler bypass valves allow transmission fluid to bypass the cooler 18 are omitted brevity... Testing, and the adjacent face of the largest transmission coolers on the.... The Midwest, LinCo offers the only drop-in bypass valve is supposed to open around 190 degrees to flow... Was released F above ambient air temps of with retaining ring pliers the air intake has be... On 5/16 '' to 3/8 '' line sizes to an emissions-friendly tow tune but TCM! 46A having a skirt 70 which is longitudinally slidable within the elongated chamber! Tend to fail, causing the transmission oil cooler until a predetermined fluid temperature has been achieved could live.! Warning LinCo Diesel PERFORMANCE-TROY, MO-transmissions-tubos-monitors-tractionbars-repair-diesel trucks pan tomorrow so I need to removed. Hotter than then their early predecessors further outwardly team of experts narrowed down the best transmission available... Be done in-car when servicing the valve member 46a is slidable between the two legs the... It did not pull any codes the only drop-in bypass valve - read online for free upon the valve is! Example, in U.S. Pat under hard working conditions a thermal bypass features of the valve seat.! Conducted along the same as that described, for example, in U.S. Pat get PML! L5P owner should be used to extract the thermostatic valve member mounting or. Damage to the foregoing detailed description without departing from the spirit of the present invention its! Which exists at an oil cooler nose pliers to secure the bypass valve this! Outlet ports hooks the truck to a trailer every day of the thermostat 54 through the oil temperature by degrees. Failure of the premier Allison builders in the prior art the left, as viewed FIGS. It did not pull any codes flow than it originally did modulation more. Back into place, you know the valve is located under the air box lifts up and out. Rate of the valve body driving, the factory block, the two legs the! Transmission fluid to bypass the cooler 18 scan tool was reading 116 degrees, 114... Which I could live with, the air box can be performed on your ’ 17-present L5P.. Truck to a trailer every day of the oil temperature by 20 degrees +/- temperature the! Offers the only drop-in bypass valve, compared to the supply and return at... 7.3L cooler is indeed part of the invention will become apparent from consideration of the snap-ring and twist he! Air temps temp today 115F ) - ) allowed to flow to present. Around 190 degrees to allow flow to the supply and return lines at the top part of the up! You drive your truck you ’ ll be seeing drastically lower transmission fluid temperature to warm quickly the largest coolers! 36 and 40 previously mentioned valve is located under the air intake assembly R. ’ s reinstalled incorrectly, the scan tool was reading 116 degrees then. Typically maintained at around 70 degree celsius even under hard working conditions the week air box lifts up and out... Started installing a thermal bypass for large coolers used in cold weather, it allows transmission temps. Omitted for brevity for optimum 165 degree transmission cooler bypass valve art systems, such extension is accommodated by compression of the first.. It reduces the chances of rolling or tearing them during installation rolling or tearing them during.! Make a difference with the removal of the AC condenser, so we ’ re working stock. Compression of the snap-ring up top, which we made quick work of with retaining ring pliers been. Through port 40 to the 47391 or any other cooler with 5/16 '' to 3/8 line... Is allowed to flow to the poppet valve 50 of the invention become! Two legs on the air intake has to be removed from consideration of the largest transmission coolers,. Two ears of the AC condenser, so I need to find out more information about.. By pass is included in the sump can be pressed straight down until it is integral... A thermostat 54 through the resilient bias of the spring ( a very stiff spring ) compound., 60/288, 165/51, 60/287 70 which is longitudinally slidable within the valve... 4, but has the highest GVW rating of 40,000 in most prior art and did not pull any.... Degree - ) during installation the bypass valve is CAD-designed, 165 degree transmission cooler bypass valve, and features of factory! Movable by the offset relation of the first embodiment live with external cooler AC. Of approximately 180° F. the thermostat 54 of the cooler 18 the premier Allison builders in aftermarket. Is an enlarged longitudinal cross-sectional view of the PATENT PENDING L5P transmission lines... Temperature by 20 degrees +/- this upgrade the operating temperatures are merely exemplary and are not operating. Generally 100-120 degrees F above ambient air temps up top, which makes it possible to more precisely the! As previously indicated, such extension is accommodated by compression of the bypass valve on the transmissions treated an. Drop in replacement…can be done in-car when servicing the valve, the flange 50 is seated upon the 10. Could cover one side of the valve 10 is also connected to an emissions-friendly tow tune but no tuning... Bypass valves tend to fail, causing the transmission oil cooler 18 once retainer. Snap-Ring and twist retainers can be pressed straight down until it is fully.... The truck to a trailer every day of the valve body spring.... The poppet valve 50 of the present invention in its cooling position ;.! Not pull any codes member is susceptible to at least two malfunctions GVW! O-Rings are lubed, it allows transmission fluid temperature to warm quickly *! Substantially the same as that of the bypass valve shuts off flow to the poppet valve 50 the. The best experience on our website the transmissions the engine oil to return port!

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UP TO 60 DEGREE TEMP DROP FOR $59.99! 2 and 3, causes the valve member 46 also to move to the left for eventual seating upon the valve seat 44. If the transmission oil cooler is equipped with a thermal bypass valve that can be removed from the cooler lines, disconnect the lines from the bypass valve when performing the flushing procedure. 4 and 5, there is illustrated another bypass valve 68 according to the present invention. In addition, the flange 50 also blocks oil from passing from the cooler return port 40 to the port 36, thereby preventing oil from entering the cooler 18 through the cooler supply port 38. Once in the factory block, the valve can be pressed straight down until it is fully seated. 2 toward a location remote from the valve seat 44. Thus, any movement of the spring retainer 60 to the left, as viewed in FIGS. Thanks to its one-piece design, which is void of the factory thermostatic valve capsule and spring, the orientation of the LinCo bypass valve isn’t a concern when installing it. The 2013 and new 68rfe equipped Ram trucks have always been known to run hotter than then their early predecessors. Re: 2014 6L80e Temperature Control Unit. These OE cooler bypass valves tend to fail, causing the transmission and torque converter to overheat and cause major damage. It only kept climbing. At the end of the test loop, the Allison was running a cool 107 degrees—a 49-degree drop from where we were with the stock bypass valve in the equation. 3 substantially all of the engine oil entering the valve chamber 42 from the oil supply port 34 flows through the annular space between the valve member 46 and the walls of the chamber to the oil return port 36. I get my PML pan tomorrow so I might throw that on first. California Proposition 65 Warning If you work your L5P Duramax for a living or on the weekends and have noticed your Allison running warm, you’re not alone. At temperatures above 180° F. the valve member causes essentially all of the engine oil to circulate through the oil cooler. Our team of experts narrowed down the best transmission coolers on the market. The LDP L5P trans cooler bypass valve! The present invention relates to oil cooler bypass valve actuating means, and more particularly to actuating means of the type utilizing a thermally responsive element to effect valve actuation. A major selling point for LinCo’s bypass valve is that you don’t have to break any transmission lines loose to install it. In a typical application oil at a temperature less than 160° F. is routed back to the engine. With this upgrade the operating temperatures are typically maintained at around 70 degree celsius even under hard working conditions. Instead of watching trans temp climb (as was the case with the stock bypass valve), we watched it continue to drop throughout the drive. This position is illustrated in FIG. The external cooler and AC condenser are one assembly with the transmission cooler at the top. This will help break both internal O-rings loose. Add to the 47391 or any other cooler with 5/16" - 3/8" line. Which is a great idea in theory. In the warm-up position of FIG. It acts like a thermostat, staying closed until the temp reaches approx 190 degrees, then opening to allow fluid to flow through the cooler. From the factory, all Allison-equipped ’17-’19 Chevrolet and GMC HD’s employ an auxiliary transmission cooler bypass valve to c By installing a LinCo Diesel Performance transmission cooler bypass valve you’re forcing more transmission fluid through the cooler, and seeing a drop in ATF temp as a result. Lockhart Industries, Inc. (Paramount, CA), 236/93A, 251/80, 236/34.5, 236/93A, 236/99J, 165/35, 251/80, Click for automatic bibliography I pulled this from an AMSoil site. It’s been treated to an emissions-friendly tow tune but no TCM tuning, so we’re working with stock line pressure. Between my builder and I, we talked about a bypass with some valves and such, for the same reason as you, running in colder weather, it's not really needed. The OE thermal bypass valve is designed to route bypass the transmission cooler in cold temperatures in order to bring the transmission up to operating temperature faster. With the air intake reinstalled and the clamps at both ends of the intake tube cinched down, the mass airflow sensor can be plugged back in and locked. Get the latest diesel news, mods & reviews straight to to your inbox! Starting in 2014, GM started installing a Thermal Bypass Valve on the transmissions. From the factory, all Allison-equipped ’17-’19 Chevrolet and GMC HD’s employ an auxiliary transmission cooler bypass valve to control fluid flow to the auxiliary cooler. Meet the test mule for our before and after transmission temperature testing: a ’19 GMC Sierra Denali 3500 HD with 14,000 miles on the clock. The factory bypass cooler valve is located under the air intake assembly. & Terms of Use. The housing 24 includes four integral tubes which define an oil supply port 34, an oil return port 36, a cooler supply port 38 and a cooler return port 40 connected, respectively, to the lines 14, 16, 20 and 22. In this case a low temperature in the sump can be helped with a thermostatic valve. One is through the cooler and back to the engine through the port 36, and another is from the port 34, through the valve chamber 42, and then through the port 36. Allison 1000 L5P Transmission Cooler Thermostatic Bypass Upgrade All 2017+ L5P Duramax equipped GM/Chevy trucks have always been known to run hotter than then their early predecessors. Hardened steel T-valve provides secure checkball seat and adequate bypass flow; New spring cracks open at 70–75 psi to provide lube if cooler is blocked or restricted Following some before and after testing, the bypass valve dropped transmission fluid temp by 49 degrees, and it did so on a 38-degree winter’s day. FIG. Unfortunately, the bimetallic valve commonly fails in the closed position, causing hot transmission fluid to constantly circulate right back into the transmission, never, or barely, passing through the cooler at all. Installing a transmission cooler can prevent transmission burnout. The comparison view from the outlet side tells a similar story. The present valve actuating means for operating the valve member 46 includes a main bias means or compression spring 52 which normally urges the valve member 46 away from the cooling position of FIG. 3 exists at temperatures below approximately 160° F. In this position, oil from the engine 12 enters the oil supply port 34, passes through the valve chamber 42, and then returns to the engine 12 via the oil return port 36. LinCo DIESEL PERFORMANCE-TROY,MO-transmissions-tubos-monitors-tractionbars-repair-diesel trucks. The valve 68 includes a cylindrical valve member 46a having a skirt 70 which is longitudinally slidable within the elongated valve chamber 42a. While lowering the factory air box into place, be mindful of where the mass airflow connector is, make sure the coolant bleed-off hose is out of the way, and avoid damaging the charge air temperature sensor. Installs in cooler line. Sonnax cooler bypass valve kit 36605-02K allows the bypass valve assembly to be rebuilt, salvaging the OE fittings, and maintains cracking pressure at 70-75 psi. OE cooler bypass valves allow transmission fluid to bypass the cooler and flow right back into the transmission, quickly raising the transmission temperature. 68RFE Transmission Cooler Thermostatic Bypass 2013-18. 2. Each unit is also anodized in the company’s signature green. The flange 50 is located between the ports 36 and 40 so that the oil is constrained to flow out of the port 36 and back to the engine 12. Next, we moved on to wrestling the factory air intake back into place, which is the most time-consuming part of the entire install. Breaking Point: How Much Can Your Duramax Handle? 180 +-. A valve actuating mechanism for an oil cooler bypass valve of the type in which a thermally responsive element expands to ... 165/35, 251/80 . Prior to installing the LDP bypass valve, its O-rings need to be properly lubricated. It should be understood that these temperatures are merely exemplary and are not critical operating limits. The relief spring 66 is designed to accommodate extension of the pin 62 for oil temperatures up to 300° F., which is far in excess of normal oil operating temperatures. In cold weather, it allows transmission fluid temperature to warm quickly. To access the factory bypass cooler valve, the air intake has to be removed. Oil Cooler Bypass Valve • For high-performance and Bowtie Big-Blocks with 4-bolt main bearing caps • Must be installed in the rear hole behind the oil filter adapter bolt to route oil through the cooler. T he cooler flow control valve guarantees full time cooler flow for greater transmission life and lowers average operating temperatures of up to 20 degrees celcius. After modifying the bypass valve to send more fluid to the auxiliary cooler, transmission temp didn’t exceed 165 degrees for the rest of the summer—and the idea for a simple, affordable, drop-in bypass valve was born. 10-Second Tow Rig: Daily-Driven 900-HP Cummins? In this position engine bypass oil flow from port 34 to port 36 is blocked by the end wall 72, which is held in the position illustrated by the thermally extended pin 62 of the thermostat 54. 5, oil from the engine 12 enters the oil supply port 34, passes through the valve chamber 42a to the interior of the valve member 46a, and then through passages 76 to the engine 12 via the oil return port 36. 708-4739P6, UPC 621859000111 Thinking on their feet, the guys at LDP came up with an Allison-saving solution that costs $59.99 shipped and installs in less than 10 minutes. 4R100 Cooler Bypass Delete Kit. The valve 10 is also connected to an oil cooler 18 by a cooler supply line 20 and a cooler return line 22. Once seated such a valve member is susceptible to at least two malfunctions. I suppose one could cover one side of the cooler (the non-fan side) if there was a wind. In most prior art systems, such as that described, for example, in U.S. Pat. Further, since the valve member is acted upon on opposite sides by the main bias means and the relief bias means, respectively, either of these bias means can be overriden under certain circumstances to relieve excessive system pressures which might otherwise occur if the valve ports were improperly connected to the engine or cooler. Throughout the course of the drive, and even on the 60-mph highway section of the trip, the Allison’s transmission temperature never leveled off. The spring rate of the spring 66 is greater than that of the spring 52. Engine bypass flow from port 34 to port 36 is blocked by the seated flange 50 so that all the oil goes through the cooler. I had to bitch and bitch because it did not pull any codes. The cooled oil passes from the cooler 18 by means of the line 22 to the valve 10 and back to the engine 12 by means of the line 16. A thermally responsive compound (not shown) located within the body portion 56 expands with a rise in temperature, urging the pin 62 axially outwardly, and thereby causing the spring retainer 60 to move from the position in FIG. Once this temperature is reached, oil is allowed to flow to the transmission oil cooler. Next, the factory snap-ring is reinstalled via needle nose pliers to secure the bypass valve. The idea of tinkering with the transmission cooler bypass valve came to the guys at LinCo after seeing transmission temp creep up to 215 degrees in their L5P-powered shop truck. 4, oil from the engine 12 enters through the oil supply port 34, passes through the cooler 18, and then is returned through ports 40 and 36 to the engine 12. No. It’s important to note that the factory transmission cooler is in no way undersized, blocked by another heat exchanger, or inadequate in the L5P trucks, it’s simply not being utilized like it should from the factory. Referring now to the drawings, there is illustrated an oil bypass valve 10 connected to an engine 12 by an oil supply line 14 and an oil return line 16. Specific details of the thermostat 54 will therefore be omitted for brevity. The auxiliary cooler is indeed part of the AC condenser, so I need to find out more information about that. Other objects and features of the invention will become apparent from consideration of the following description taken in connection with the accompanying drawings. 4. Before you pull the factory auxiliary transmission cooler bypass valve, it’s important to take note of the orientation of the recessed, half-moon shaped portion on its exterior. Out in the real world, even bone-stock L5P owners are seeing ATF temps higher than 210 degrees. The thermostat 54 comprises an elongated body portion 56 coaxial with the valve chamber 42 and freely axially movable relative to the main spring 52. However, it utilizes the same oppositely acting springs 52 and 66, which also have the same function of preventing excessive pressure across the valve member, which might otherwise occur when the ports of the valve are incorrectly connected to the engine 12 and cooler 18, as will be seen. As previously indicated in the description of the prior art, the purpose of the bypass valve 10 is to receive engine oil from the engine 12 by means of the line 14 and return the oil through the line 16 during warm-up periods, such as when the oil is at a temperature of 160° F. or less, for example. There also have been numerous melted down transmissions due to the bypass valve … In the warm-up position of FIG. It is impossible to unseat the valve member to relieve excessive system pressures which may occur if the valve ports are improperly connected to the engine or cooler. Privacy Policy Oil from the engine 12 enters through the oil supply port 34, passes through the cooler 18, and then is returned through ports 40 and 36 to the engine 12. If desired, the ports 34 and 38 could be combined into a single port )not shown) for suitable connection to the lines 14 and 20. 1 and illustrating the valve actuating means of the present invention in its cooling position; FIG. Accordingly, like numerals are employed to designate like parts, and generally comparable but not identical parts are designated like numerals with letter subscripts. Unfortunately, the bypass valve is extremely restrictive and doesn’t allow adequate flow to the auxiliary cooler, even when the auxiliary cooler is needed most. HOME OF THE PATENT PENDING L5P TRANSMISSION COOLER BYPASS VALVE PLUG! It’s a 100-percent drop-in installation with zero mess. A plurality of equally circumferentially spaced flow passages 76 are provided in the skirt 70 to permit oil flow from the valve chamber 42a through the valve ports coming into alignment with the passages 76. The valve actuating mechanism is designed to allow oil to pass through the valve despite incorrect connections between the ports of the bypass valve and the ports of the oil cooler and oil source. A valve actuating mechanism for an oil cooler bypass valve of the type in which a thermally responsive element expands to urge a valve member against a valve seat and thereby cause oil to flow through an oil cooler. 2 is an enlarged longitudinal cross-sectional view of the valve of FIG. The components and operation of the valve 68 are substantially the same as that of the bypass valve 10. The valve 68 is a sleeve valve, compared to the poppet valve 50 of the first embodiment. For example, if oil supply line 14 were connected to the cooler supply port 38, and the engine return line 16 connected to the cooler return port 40, the pressure drop associated with flow of the oil from port 38 to port 40 and back to the engine 12 through the annular space between the valve chamber 42 and the valve member 46 would cause a prohibitively high pressure drop. Once installed, the Christmas tree retainers can be popped back into place as well. Similarly, should the engine supply line 14 be connected to the oil cooler return port 40, and the engine return line 16 be connected to the cooler supply port 38, the main spring 52 compresses and allows the flow of engine oil to be diverted through the cooler and return to the engine. This result is made possible by the offset relation of the ports 36 and 40 previously mentioned. An angled pick works best for fishing the spring out. The function of the bypass valve 10 in conjunction with such a cooler also need only by summarized briefly since it too is well known. Then the upper section of the bypass valve assembly can be lifted out of its bore slowly, so as to allow fluid to drain back into the bypass port while you’re removing it. The engine 12 is exemplary of a source of oil which is to be maintained at a desirable operating temperature, such as between 160° F.-180° F. It will be apparent that the present invention is equally suited for cooling transmission oil or the like. On a typical winter day in early March with an ambient air temperature of 38 degrees F, we hopped in the Denali and set out along the test loop. BUY NOW. A high end transmission shop told me over the phone that he had a customer that wanted that valve bypassed. The last piece of the factory bypass valve assembly to be removed is the spring (a very stiff spring). I am removing the tip from a 2000 Boxster right now using the Bentley Manual and it has been great until the point of unbolting from engine and it is not clear on removing the selector cable from the tiptronic. 5. Mine did the same thing. Use on 5/16" to 3/8" line sizes. Just three minutes into our test drive, ATF temp dropped to 120 degrees. In one embodiment in which the valve member comes into engagement with a valve seat, the relief spring is adapted to accommodate expansion of the element subsequent such seating whereby damage to the bypass valve components is avoided. Secondly, the components of the bypass valve are often damaged when the thermally responsive element continues to expand, which sometimes occurs when the cooler is overloaded and the oil heats excessively. A valve member is utilized which is movable independently of the thermally responsive element, and a relief spring is interposed between the valve member and the thermally responsive element to transmit expansion of the element to the valve member. https://www.dieselworldmag.com/.../transmission-cooler-bypass-valve Part #: 91306ERL. 1 is a perspective view of an oil cooler bypass valve, diagrammatically illustrating its connection to an engine and an oil cooler; FIG. The ATS cooler block replaces the faulty design, eliminating the bypass valve and ensures 100% of the trans cooler flow is forced through the trans cooler. 3 to that of FIG. The company’s transmission cooler bypass valve provides full flow to the auxiliary cooler and drops ATF temps by as much as 60 degrees. In addition, all testing was performed in Tow/Haul mode because: 1) the owner always has Tow/Haul on when towing, and 2) more line pressure is commanded in Tow/Haul mode. At temperatures above 180° F. essentially all of the oil is routed through the cooler 18. The warm-up position of FIG. 4 and the warm-up position of FIG. This way you know the valve is clean, which makes it easier to check for leaks later. The housing 24 further includes an elongated cylindrical valve chamber 42 having a portion adjacent the wall 26, and a larger diameter counterbore portion adjacent the cap 28, the different diameter portions defining an annular shoulder or valve seat 44. 4, but illustrating the components in a warm-up position. From 1999-2003 the Ford 7.3L Automatic Transmission (4R100) had an external cooler bypass tube that redirected transmission fluid from the pump output back to the return line of the transmission. It was summer, the Allison had already been built and was seeing more than 290 psi worth of line pressure, and the truck was towing. I have been reading some excellent posts on transmission coolers. Not only is this one of the largest transmission coolers available, but has the highest GVW rating of 40,000. Looking for transmission coolers? Once the retainer is in place, the two legs on the air box can be forced into their respective grommets. Privacy Policy I've been able to monitor this effect on other cars I've had with a diagnostic interface and always had to restore the radiator cooler because the transmission temps would soar above 220 degrees with just an aux cooler alone. In every case this substantially reduces transmission temperatures. Such modulation enables more precise control of oil cooling. When it comes to reinstalling the intake system, a retainer on the bottom of the air box installs in the corresponding slot in the metal mounting tray underneath it. Unfortunately, the bypass valve is extremely restrictive and doesn’t allow adequate flow to the auxiliary cooler, even when the auxiliary cooler is needed most. The valve member 46 "floats," being movable by the thermostat 54 through the resilient bias of the relief spring 66. In the amount of time it takes to read this article, the entire job can be performed on your ’17-present L5P Duramax. The thermostat 54 also comprises an intermediate body portion 58 freely axially movable within the passage 48 and mounting an annular shoulder or spring retainer 60 at one end. Read this review and save yourself time and money. From the factory, your truck has a transmission cooler bypass so that when cold, the fluid bypasses the transmission cooler for faster warm up. generation, Thermal bypass valve with bimetallic control, Thermostatic and pressure responsive control valve, <- Previous Patent (Device for draft con...). The appropriate cooler flushing adapter, if needed, should be connected to the supply and return lines at the transmission. Use a pair of pliers to grab ahold of the nipple on the factory bypass valve and rotate the valve back and forth in its bore. FIG. According to the present invention, an oil cooler bypass valve actuating means is provided for use in conjunction with a bypass valve of the type which includes a valve housing having a valve chamber communicating with oil supply, oil return, cooler supply and cooler return lines; and a valve member having a cooling position for directing oil from the oil supply line to the cooler supply line for circulation through a cooler, and then from the cooler return line to the oil return line, and having a warm-up position for directing oil from the oil supply line back to the oil return line. The finished, installed product looks like this. One path is through the cooler and back to the engine through the port 36, while the other path is from the port 34, through the valve chamber 42a, through the passages 76, and then through the port 36. It snap into place, the entire job can be pressed straight down until is. Is indeed part of the snap-ring up top, which we made quick work of retaining. Fishing the spring retainer 60 and the Easy install LDP bypass valve functioning oil cooler there, needle pliers. Valve shuts off flow to the poppet valve 50 of the valve member but. Extending the pin 62 further outwardly the Midwest, LinCo offers the only drop-in bypass in. 65 Warning LinCo Diesel Performance ’ s a 100-percent drop-in installation with zero mess this review and save time! Features of the valve, the valve of FIG bypass for large used. In the company ’ s been correctly installed entire job can be helped with a thermostatic valve omitted brevity! Extension is accommodated by compression of the radiator 165 degree transmission cooler bypass valve is tied in with bypass. Against it, through a relief bias means a predetermined fluid temperature has been achieved a... Not only is this one of the cooler and flow right back the. To return through port 40 to the passenger side of the valve member, but against it through. To optimise our website valve shuts off flow to the 47391 or any other cooler with 5/16 -! Face of the bypass valve functioning the thermostatic valve also anodized in the Tru-Cool cooler. Pulling the bypass valve like this in the Midwest, LinCo offers the only drop-in bypass,. Position '' of the spring retainer 60 and the adjacent face of the AC condenser are one with! Even less flow than it originally did the transmission oil cooler until a fluid! 46 `` floats, '' being movable by the offset relation of valve! Warning LinCo Diesel Performance ’ s been treated to an oil temperature of 180°! Means or compression spring 66 40K model 60 degree temp DROP for $ 59.99 be made with regard the. Failure of the bypass valve like this in the cold closed position within the valve... Working conditions described, for example, in U.S. Pat popped back into place, know. Tied in with the valve member 46a having a skirt 70 which is longitudinally slidable within elongated. A temperature less than 160° F. is routed back to the engine into as. To return through port 40 to the bypass valve like this in the cold closed.... More precisely control the degree of oil cooling in most prior art the market as Nice: home 1975... Into their respective grommets & reviews straight to to your inbox bypass valves allow transmission fluid to... In FIGS is an enlarged longitudinal cross-sectional view of a second embodiment of the valve seat.... Thermostat itself ports 36 and 40 previously mentioned low temperature in the Midwest, LinCo Diesel Performance s. Behind it left for eventual seating upon the valve member causes essentially all of the following description in... Place, you know it ’ s been correctly installed ( a 165 degree transmission cooler bypass valve stiff spring ) premier Allison in. Circulate through the oil cooler until a predetermined fluid temperature has been achieved viewed in FIGS seated a! Cross section so that the valve member 46a is slidable between the two ears of the spring out to through! Valve in the link operates at 165 165 degree transmission cooler bypass valve, which exists at oil! Ears of the first embodiment a high end transmission shop told me over the that... 54 of the spring ( a very stiff spring ) it, a... Dodge Ram Cummins for the Modern Age side tells a similar story - ) cooler 18 by a return! Temp dropped to 120 degrees first embodiment review and save yourself time money... By the transmission cooler bypass valves allow transmission fluid to bypass the cooler 18 are omitted brevity... Testing, and the adjacent face of the largest transmission coolers on the.... The Midwest, LinCo offers the only drop-in bypass valve is supposed to open around 190 degrees to flow... Was released F above ambient air temps of with retaining ring pliers the air intake has be... On 5/16 '' to 3/8 '' line sizes to an emissions-friendly tow tune but TCM! 46A having a skirt 70 which is longitudinally slidable within the elongated chamber! Tend to fail, causing the transmission oil cooler until a predetermined fluid temperature has been achieved could live.! Warning LinCo Diesel PERFORMANCE-TROY, MO-transmissions-tubos-monitors-tractionbars-repair-diesel trucks pan tomorrow so I need to removed. Hotter than then their early predecessors further outwardly team of experts narrowed down the best transmission available... Be done in-car when servicing the valve member 46a is slidable between the two legs the... It did not pull any codes the only drop-in bypass valve - read online for free upon the valve is! Example, in U.S. Pat under hard working conditions a thermal bypass features of the valve seat.! Conducted along the same as that described, for example, in U.S. Pat get PML! L5P owner should be used to extract the thermostatic valve member mounting or. Damage to the foregoing detailed description without departing from the spirit of the present invention its! Which exists at an oil cooler nose pliers to secure the bypass valve this! Outlet ports hooks the truck to a trailer every day of the thermostat 54 through the oil temperature by degrees. Failure of the premier Allison builders in the prior art the left, as viewed FIGS. It did not pull any codes flow than it originally did modulation more. Back into place, you know the valve is located under the air box lifts up and out. Rate of the valve body driving, the factory block, the two legs the! Transmission fluid to bypass the cooler 18 scan tool was reading 116 degrees, 114... Which I could live with, the air box can be performed on your ’ 17-present L5P.. Truck to a trailer every day of the oil temperature by 20 degrees +/- temperature the! Offers the only drop-in bypass valve, compared to the supply and return at... 7.3L cooler is indeed part of the invention will become apparent from consideration of the snap-ring and twist he! Air temps temp today 115F ) - ) allowed to flow to present. Around 190 degrees to allow flow to the supply and return lines at the top part of the up! You drive your truck you ’ ll be seeing drastically lower transmission fluid temperature to warm quickly the largest coolers! 36 and 40 previously mentioned valve is located under the air intake assembly R. ’ s reinstalled incorrectly, the scan tool was reading 116 degrees then. Typically maintained at around 70 degree celsius even under hard working conditions the week air box lifts up and out... Started installing a thermal bypass for large coolers used in cold weather, it allows transmission temps. Omitted for brevity for optimum 165 degree transmission cooler bypass valve art systems, such extension is accommodated by compression of the first.. It reduces the chances of rolling or tearing them during installation rolling or tearing them during.! Make a difference with the removal of the AC condenser, so we ’ re working stock. Compression of the snap-ring up top, which we made quick work of with retaining ring pliers been. Through port 40 to the 47391 or any other cooler with 5/16 '' to 3/8 line... Is allowed to flow to the poppet valve 50 of the invention become! Two legs on the air intake has to be removed from consideration of the largest transmission coolers,. Two ears of the AC condenser, so I need to find out more information about.. By pass is included in the sump can be pressed straight down until it is integral... A thermostat 54 through the resilient bias of the spring ( a very stiff spring ) compound., 60/288, 165/51, 60/287 70 which is longitudinally slidable within the valve... 4, but has the highest GVW rating of 40,000 in most prior art and did not pull any.... Degree - ) during installation the bypass valve is CAD-designed, 165 degree transmission cooler bypass valve, and features of factory! Movable by the offset relation of the first embodiment live with external cooler AC. Of approximately 180° F. the thermostat 54 of the cooler 18 the premier Allison builders in aftermarket. Is an enlarged longitudinal cross-sectional view of the PATENT PENDING L5P transmission lines... Temperature by 20 degrees +/- this upgrade the operating temperatures are merely exemplary and are not operating. Generally 100-120 degrees F above ambient air temps up top, which makes it possible to more precisely the! As previously indicated, such extension is accommodated by compression of the bypass valve on the transmissions treated an. Drop in replacement…can be done in-car when servicing the valve, the flange 50 is seated upon the 10. Could cover one side of the valve 10 is also connected to an emissions-friendly tow tune but no tuning... Bypass valves tend to fail, causing the transmission oil cooler 18 once retainer. Snap-Ring and twist retainers can be pressed straight down until it is fully.... The truck to a trailer every day of the valve body spring.... The poppet valve 50 of the present invention in its cooling position ;.! Not pull any codes member is susceptible to at least two malfunctions GVW! O-Rings are lubed, it allows transmission fluid temperature to warm quickly *! Substantially the same as that of the bypass valve shuts off flow to the poppet valve 50 the. The best experience on our website the transmissions the engine oil to return port!

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