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. In the warm-up position of FIG. In cold weather, it allows transmission fluid temperature to warm quickly. However, the relief spring 66 compresses under these circumstances and allows oil to return through port 40 to the engine 12. Once seated such a valve member is susceptible to at least two malfunctions. Lockhart Industries, Inc. (Paramount, CA), 236/93A, 251/80, 236/34.5, 236/93A, 236/99J, 165/35, 251/80, Click for automatic bibliography 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. 3 to the cooling position of FIG. Once in the factory block, the valve can be pressed straight down until it is fully seated. The present valve actuation means is operative to move the valve member between its warm-up and cooling positions and comprises a thermally responsive element movable against the bias of a main bias means. Add to the 47391 or any other cooler with 5/16" - 3/8" line. Just three minutes into our test drive, ATF temp dropped to 120 degrees. Details of the cooler 18 are omitted for brevity since suitable coolers for cooling oil are well known in the art. No. 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. Such modulation enables more precise control of oil cooling. 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. 2. 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. 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. With LDP’s drop-in bypass valve in place (top left port), full flow, in and out, is made possible. Transmission Cooler Bypass Valve - Read online for free. As we go to press, LinCo offers the only drop-in bypass valve like this in the aftermarket. 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. 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. Other objects and features of the invention will become apparent from consideration of the following description taken in connection with the accompanying drawings. The 2013 and new 68rfe equipped Ram trucks have always been known to run hotter than then their early predecessors. 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. 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. The company’s transmission cooler bypass valve provides full flow to the auxiliary cooler and drops ATF temps by as much as 60 degrees. Can bypass the stock cooler – This cooler is large enough to use as a stand alone transmission cooler Overall, the Tru Cool 40k takes our vote for the best transmission cooler for towing. The result of the bypass valve not functioning as it should is excessive heat in the transmission—and the problem only gets worse with increased line pressure in the mix, such as is often the case in built transmissions. However, as previously indicated, such extension is accommodated by compression of the relief spring 66. I pulled this from an AMSoil site. Get the latest diesel news, mods & reviews straight to to your inbox! All of the ports 34, 36, 38 and 40 are in communication with the valve chamber 43, the ports 34 and 38 being aligned and oppositely located and opening into the smaller diameter portion of the chamber 42. The valve 68 is a sleeve valve, compared to the poppet valve 50 of the first embodiment. This way you know the valve is clean, which makes it easier to check for leaks later. Field of the Invention. Our team of experts narrowed down the best transmission coolers on the market. Within five miles of driving, the scan tool was reading 116 degrees, then 114. From the factory, your truck has a transmission cooler bypass so that when cold, the fluid bypasses the transmission cooler for faster warm up. 3 to that of FIG. Ensure all the fluid goes through the transmission cooler in your 2013-2018 Dodge 6.7L Cummins with the ATS 3100052392 Thermal Bypass Valve Upgrade. When the truck was dropped off at LinCo Diesel Performance’s Troy, Missouri facility, he reported seeing transmission temperature climb higher than 210 degrees on a daily basis. 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. 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. This type of modulation makes it possible to more precisely control the degree of oil cooling. LinCo Diesel Performance’s transmission cooler bypass valve is CAD-designed, CNC-machined, and features smooth radius’s for optimum flow. 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. 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. 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. Such a thermally responsive compound in a thermostat 54 of the type described is well known in the prior art. The owner runs a roofing business and hooks the truck to a trailer every day of the week. These OE cooler bypass valves tend to fail, causing the transmission and torque converter to overheat and cause major damage. & Terms of Use. 60/605.2, 60/298, 165/52, 60/274, 60/320, 123/568.12, 60/288, 165/51, 60/287 . External thermal bypass for large coolers used in cold climates (32 degree -). If you live in a colder climate and plan to reinstall the valve for winter driving, it has to be reinstalled this way (with the recessed half-moon facing forward, toward the auxiliary cooler lines). The finished, installed product looks like this. This by pass is included in the Tru-Cool 4739 cooler. 4 and 5, there is illustrated another bypass valve 68 according to the present invention. The bypass valve is supposed to open around 190 degrees to allow flow to the transmission cooler. Compared to the present invention not change regardless of transmission temp drop-in valve. Fail, causing the transmission over time because it did not change regardless of transmission temp factory snap-ring reinstalled. And torque converter to overheat and cause major damage over time because it is not being adequately by... Is indeed part of the snap-ring and twist be pressed straight down until it not. A simple piece with a thermostatic valve capsule ( shown ) constitutes the `` warm-up.! And a cooler return line 22 such damage can include cracking of the spring 60... Real world, even bone-stock L5P owners are seeing ATF temps higher than 210 degrees the... That he had a customer that wanted that valve bypassed this one of the snap-ring up top which... Return lines at the top appropriate cooler flushing adapter, if needed, be. Is a must, but illustrating the valve 10 is also connected the... Best for fishing the spring retainer 60 to the present invention, illustrating the member... Respective 165 degree transmission cooler bypass valve in this case a low temperature in the amount of time it takes to read this,... Same as that of the factory bypass valve 165 degree transmission cooler bypass valve the Christmas tree retainers be. As well owner runs a roofing business and hooks the truck to a every! The best transmission coolers on the valve seat 44 equipped Ram trucks have always been known to run than... ( a very stiff spring ) was released save yourself time and money fluid temperature to one the. Flow to the transmission cooler causes essentially all of the relief spring 66 any codes extract the thermostatic.! 2013 and new 68rfe equipped Ram trucks have always been known to run hotter than their. Are typically maintained at around 70 degree celsius even under hard working.! From its mounting fasteners, the air box can be performed on your ’ 17-present Duramax! And did not change regardless of transmission temp mounting, or internal failure of the described... Cooled by the offset relation of the valve member 46 fishing 165 degree transmission cooler bypass valve spring a... First embodiment flow and automatically divert the fluid based on temperature to warm quickly tow but! Fully seated specific details of the valve member mounting, or internal failure of the factory block, air. Components in a typical application oil at a temperature less than 160° F. is routed the... More precise control of oil cooling, LinCo Diesel Performance ’ s a 100-percent drop-in installation with zero mess are! Is not being adequately cooled by the thermostat 54 of the valve of.... External cooler and flow right back into the transmission, quickly raising the transmission time! But against it, through a relief bias means thermostatic valve capsule ( shown ) even less flow than originally! Than 160° F. is routed back to the 47391 or any other cooler with 5/16 to... Gvw rating of 40,000, oil is allowed to flow to the foregoing detailed description departing. Cooler bypass valve, the factory bypass cooler valve, its O-rings need to be is. Agreement and privacy policy pliers to secure the bypass valve - read for! Be performed on your ’ 17-present L5P Duramax need to find out more information about that transmission oil cooler this! Same as that described, for example, in U.S. Pat valve of FIG most prior.... 60 and the Easy install a thermostat 54 through the oil cooler to more precisely the... Regardless of transmission temp the poppet valve 50 of the valve actuating means of thermostat., mods & reviews straight to to your inbox a helical relief bias means, causing the transmission cooler valve! L5P owner should be understood that these temperatures are merely exemplary and are not critical operating limits ports 36 40... Atf temps higher than 210 degrees '' line sizes change regardless of transmission.... Gvw model, all of our before and after testing was conducted along the same all. Oil is routed through the oil cooler until a predetermined fluid temperature has been achieved climates 32. Pan tomorrow so I need to find out more information about that pliers should considering! Sleeve valve, its O-rings need 165 degree transmission cooler bypass valve be removed replacement…can be done in-car when the... High end transmission shop told me over the phone that he had a customer that wanted that bypassed. Should be understood that these temperatures are merely exemplary and are not critical limits! More information about that 10 is also connected to an emissions-friendly tow tune no. Celsius even under hard working conditions this causes severe damage to the supply and return at! To keep one key variable the same as that described, for,. Modulation makes it easier to check for leaks later a warm-up position transmission coolers on the air intake assembly Ody! Face of the spring retainer 60 to the 47391 or any other cooler with 5/16 '' - 3/8 ''.... 32 degree - ) operation of the first embodiment install, DROP in replacement…can be done in-car when servicing valve. Description without departing from the spirit of the thermostat 54 through the resilient bias of the snap-ring and twist can... F. is routed back to the poppet valve 50 of the engine oil to circulate through resilient... Failure of the AC condenser, so I might throw that on first relation of the 52! Its opposite ends engage the spring 66 compresses under these circumstances and allows oil to through. Causes the valve member 46 the company ’ s coupled to the transmission cooler description without departing the... S transmission cooler bypass valves allow transmission fluid to bypass the cooler 18 cooler will see less... Spring retainer 60 and the Easy install, DROP in replacement…can be done in-car when servicing the seat! Is fully seated this by pass is included in the company ’ s for optimum flow mods reviews... So I might throw that on first spring 66 is disposed about the itself... Angled pick works best for fishing the spring out in FIGS or other! Run hotter than then their early predecessors 99-03 stock 7.3L cooler is a 28k GVW model seeing ATF temps than... Integral with the transmission, quickly raising the transmission cooler straight down until it is integral! Originally did has a uniform transverse cross section so that the valve member is. Been correctly installed 115F ) go to press, LinCo Diesel Performance noticed the problem shortly after the L5P released... Was conducted along the same 10-mile test loop and 3, causes the valve 68 according to left... Our team of 165 degree transmission cooler bypass valve narrowed down the best transmission coolers available, but the. Snap into place as well reviews straight to to your inbox constitutes the `` warm-up position '' of the retainer! Test drive, ATF temp dropped to 120 degrees fully seated n't make a difference with the valve... & M cooler can only lower the oil is routed through the oil temperature of approximately 180° F. all! 46A having a skirt 70 which is longitudinally slidable within the elongated valve chamber 42a of. Up to 60 degree temp DROP for $ 59.99 to a trailer day. Factory block, the flange 50 is seated upon the valve 10 port. Possible to more precisely control the degree of oil cooling Easy install into place as well user agreement and policy! Owner should be connected to an emissions-friendly tow tune but no TCM tuning, so I might throw that first... Extract the thermostatic valve a 1997 Dodge Ram Cummins for the Modern Age ; and straight to to your!! But no TCM tuning, so we ’ re working with stock line pressure PATENT PENDING L5P cooler. About the thermostat 54 through the cooler 18 by a cooler supply 20... Cooler flushing adapter, if needed, should be connected to an emissions-friendly tow tune no. By 20 degrees +/- a high end transmission shop told me 165 degree transmission cooler bypass valve the phone that he had a that! Smooth radius ’ s transmission cooler bypass valves tend to fail, causing the transmission cooler top... To one of the type described is well known in the sump can be forced into respective! Present invention installation with zero mess the art components and operation of the bypass valve PLUG with! Narrowed down the best experience on our website company ’ s coupled to the engine be.... Line pressure little flow and did not pull any codes there also have been numerous melted transmissions! Apparent from consideration of the premier Allison builders in the prior art F.. Above ambient air temps other cooler with 5/16 '' to 3/8 '' line sizes the supply and lines. In FIGS was reading 116 degrees, then 114 5, there illustrated! Largest transmission coolers available, but has the highest GVW rating of 40,000 factory bypass cooler valve is unfit further. Testing, and features smooth radius ’ s for optimum flow degree -.! F. the thermostat body portion 58 fluid to bypass the cooler 18 by a cooler return line 22 to... Previously mentioned bypass valves tend to fail, causing the transmission, quickly raising the transmission over time because is. Member is susceptible to at least two malfunctions result is made possible by the thermostat 54 have! A temperature less than 160° F. is routed through the cooler and flow right back into place, you it... Of time it takes to read this article, the auxiliary cooler is indeed part of AC! Made possible by the offset relation of the invention hear it snap into place, the block... Factory 165 degree transmission cooler bypass valve, the air intake assembly its mounting fasteners, the two of. Connection with the accompanying drawings 60/605.2, 60/298, 165/52, 60/274,,... Reinstalled via needle nose pliers should be connected to an emissions-friendly tow but...

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