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. The "floating" characteristic of the valve member 46 not only protects the valve components against damage from overextension of the pin 62, but also prevents excessive pressure drops across the flange 50 which might otherwise be caused by incorrect connection of the lines 14, 16, 20 and 22 to the bypass valve 10. 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. 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. Privacy Policy 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. Part #: 91306ERL. This causes severe damage to the transmission over time because it is not being adequately cooled by the transmission cooler. 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. We use cookies to optimise our website and give you the best experience on our website. The warm-up position of FIG. Accordingly, like numerals are employed to designate like parts, and generally comparable but not identical parts are designated like numerals with letter subscripts. Once the retainer is in place, the two legs on the air box can be forced into their respective grommets. BUY NOW. Add to the 47391 or any other cooler with 5/16" - 3/8" line. Each unit is also anodized in the company’s signature green. To see its product in action, we stopped by LDP’s Troy, Missouri facility, where it was being installed on a ’19 dually. In most prior art systems, such as that described, for example, in U.S. Pat. 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. Fluid below the valve’s set-point temperature is bypassed to a reservoir or bypass loop while fluid at or above the set-point is diverted to the system’s cooler. OE cooler bypass valves allow transmission fluid to bypass the cooler and flow right back into the transmission, quickly raising the transmission temperature. Transmission Cooler Bypass Valve - Read online for free. average) Easy install, drop in replacement…can be done in-car when servicing the valve body. 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. 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. 1 is a perspective view of an oil cooler bypass valve, diagrammatically illustrating its connection to an engine and an oil cooler; FIG. The last piece of the factory bypass valve assembly to be removed is the spring (a very stiff spring). LinCo Diesel Performance’s transmission cooler bypass valve is CAD-designed, CNC-machined, and features smooth radius’s for optimum flow. Lockhart Industries, Inc. (Paramount, CA), 236/93A, 251/80, 236/34.5, 236/93A, 236/99J, 165/35, 251/80, Click for automatic bibliography 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). Thus, the resilience of the springs 52 or 66, as the case may be, allows them to be compressed to open up paths of flow to and from the engine for various types of improper connections. 10-Second Tow Rig: Daily-Driven 900-HP Cummins? 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. 4. California Proposition 65 Warning 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. The appropriate cooler flushing adapter, if needed, should be connected to the supply and return lines at the transmission. Full time cooler flow with much lower average fluid temperature; Built in high pressure safety bypass into the lube circuit; Immediate and accurate fluid level check without warm-up cycle, which saves tech time for re-racking and rechecking. 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. 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. 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. 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. 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. However, the relief spring 66 compresses under these circumstances and allows oil to return through port 40 to the engine 12. As we go to press, LinCo offers the only drop-in bypass valve like this in the aftermarket. The springs 52 and 66 bear against opposite faces of the wall 72 so that the valve member 46a "floats" in the same manner as the valve member 46 of the first embodiment. No. Twice as Nice: Home Brewed 1975 F-250 Cummins, Cub Cadet 782D: Little Tractor, Big Smoke. 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. 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. AirflowCADChevyCNCCumminsCummins DieselDieseldiesel engineDiesel ExhaustDiesel TruckDuramaxDuramax DieselFluidGMCRadiatortransmission. Further extension of the pin 62 cannot damage any components of the valve 68 since such extension only results in slight further movement of the valve member 46a to the left, as viewed in FIG. A simple piece with a lot of R&D behind it. UP TO 60 DEGREE TEMP DROP FOR $59.99! 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. In one embodiment of the invention in which the valve member is seated against a valve seat in its cooling position, further expansion of the thermally responsive element can occur without damage to the bypass valve components since the expansion is accommodated by compression of the relief bias means. 2. 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. Mine is the same 180 degree cut over valve but the reality is it starts to close the bypass starting in the 165 sump temp range. 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. To access the factory bypass cooler valve, the air intake has to be removed. Generally, the compound is one which expands with a temperature rise to urge the pin 62 outwardly, and contracts with a temperature reduction to enable the main spring 52 to move the pin 62 inwardly. This position is illustrated in FIG. 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. A helical relief bias means or compression spring 66 is disposed about the thermostat body portion 58. It’s a 100-percent drop-in installation with zero mess. 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. 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. Referring now to FIGS. 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. XDP Transmission Cooler Thermal Bypass Valve (TBV) Upgrade XD343 Compatible with 2013-2018 Dodge Ram 6.7 Cummins Diesel Automatic Transmission (68RFE & … Thus, any movement of the spring retainer 60 to the left, as viewed in FIGS. 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. 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. 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. Once free from its mounting fasteners, the air box lifts up and rolls out of place. It should be understood that these temperatures are merely exemplary and are not critical operating limits. 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. 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. The LDP L5P trans cooler bypass valve! These OE cooler bypass valves tend to fail, causing the transmission and torque converter to overheat and cause major damage. The bypass valve is supposed to open around 190 degrees to allow flow to the transmission cooler. There also have been numerous melted down transmissions due to the bypass valve sticking in the cold closed position. My 04 Ody and I drive in Arizona (temp today 115F). FIG. Use of this site constitutes acceptance of our user agreement and privacy policy. 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. An extensible element or pin 62 is movable in and out of the thermostat body portion 58 and its free end is received within a blind bore 64 provided in the housing cap 28. 3 to the cooling position of FIG. 5. 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. It acts like a thermostat, staying closed until the temp reaches approx 190 degrees, then opening to allow fluid to flow through the cooler. We ended up with no bypass. 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. The auxiliary cooler is indeed part of the AC condenser, so I need to find out more information about that. At temperatures above 180° F. the valve member causes essentially all of the engine oil to circulate through the oil cooler. I get my PML pan tomorrow so I might throw that on first. 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. The company’s transmission cooler bypass valve provides full flow to the auxiliary cooler and drops ATF temps by as much as 60 degrees. Opens fully at approx. The finished, installed product looks like this. Product Description. Its opposite ends engage the spring retainer 60 and the adjacent face of the valve member flange 50. It’s coupled to the passenger side of the radiator and is tied in with the transmission cooler lines. Once installed, the Christmas tree retainers can be popped back into place as well. At this point all labor is complete. Such damage can include cracking of the valve member mounting, or internal failure of the thermostat itself. 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. 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. 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. 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. 3 and constitutes the "warm-up position" of the valve member 46. I pulled this from an AMSoil site. Not only is this one of the largest transmission coolers available, but has the highest GVW rating of 40,000. 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. © 2004-2021 FreePatentsOnline.com. 1 and illustrating the valve actuating means of the present invention in its cooling position; FIG. An angled pick works best for fishing the spring out. The valve 10 is also connected to an oil cooler 18 by a cooler supply line 20 and a cooler return line 22. External thermal bypass for large coolers used in cold climates (32 degree -). During the install and in the time between our initial test drive with the stock bypass valve in the mix, the Allison’s fluid temp had cooled off to 129 degrees F (from 156 degrees). Which is a great idea in theory. 5 is a view similar to FIG. Once seated such a valve member is susceptible to at least two malfunctions. 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. A major selling point for LinCo’s bypass valve is that you don’t have to break any transmission lines loose to install it. & Terms of Use. Prior to installing the LDP bypass valve, its O-rings need to be properly lubricated. The bypass valve shuts off flow to the transmission oil cooler until a predetermined fluid temperature has been achieved. There also have been numerous melted down transmissions due to the bypass valve … 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. LinCo DIESEL PERFORMANCE-TROY,MO-transmissions-tubos-monitors-tractionbars-repair-diesel trucks. The 99-03 stock 7.3L cooler is a 28k GVW model. generation, Thermal bypass valve with bimetallic control, Thermostatic and pressure responsive control valve, <- Previous Patent (Device for draft con...). The B&M cooler can only lower the oil temperature by 20 degrees +/-. 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. The comparison view from the outlet side tells a similar story. Keep reading for the full scoop on the valve, our testing, and the easy install. If it’s reinstalled incorrectly, the auxiliary cooler will see even less flow than it originally did. While we expected transmission temp to rise as the truck came up to operating temp, we didn’t expect it to go 118 degrees over ambient (for those that don’t know, 100-degrees over ambient is considered the ideal operating temp for most transmissions). Looking for transmission coolers? At temperatures above 180° F. the thermostat 54 will have the effect of extending the pin 62 further outwardly. As you can see here, the factory bypass valve (top right port) hinders fluid flow tremendously, forcing ATF to flow through what is maybe a 1/8-inch gap at best. Even though no or very little fluid is lost during the install, it pays to hit the top of the new bypass valve with brake cleaner. After unlocking and disconnecting the mass airflow sensor, the two Christmas tree style retaining clips that secure the air box have to be extracted (one is on the air box itself, while the second is below it on a coolant line). Such a thermally responsive compound in a thermostat 54 of the type described is well known in the prior art. Mine did the same thing. Installs in cooler line. The 2013 and new 68rfe equipped Ram trucks have always been known to run hotter than then their early predecessors. With LDP’s drop-in bypass valve in place (top left port), full flow, in and out, is made possible. With this upgrade the operating temperatures are typically maintained at around 70 degree celsius even under hard working conditions. The valve member 46 "floats," being movable by the thermostat 54 through the resilient bias of the relief spring 66. One end of the skirt 70 is closed by an end wall 72 having a central opening 74 just large enough to allow relative axial movement between the valve member 46a and the thermostat 54 without allowing significant fluid flow in the clearance space. The bypass valve 10 comprises, generally, an elongated cylindrical housing 24 closed at one end by an integral wall 26 and at the other end by a cap 28 held in position by a threaded connection 30 which is rendered fluid-tight by a suitable O-ring 32. A flow divider or valve member 46 is located in the valve chamber 42 and includes an elongated cylindrical body defining a through passage 48 and having a circular flange 50 adapted for engagement in substantially fluidright relation upon the valve seat 44. When the engine oil temperature exceeds 160° F. at least a portion of the oil is directed by the valve 10 to the cooler 18 by means of the line 20. Lowering the restriction of flow into and then back out of the bypass valve is the key to the 40-60-degree drop in fluid temperature end-users see. But it won't make a difference with the Bypass Valve functioning. 4, but illustrating the components in a warm-up position. The next time you drive your truck you’ll be seeing drastically lower transmission fluid temps. 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. One end of the spring 52 bears against the valve housing wall 26 and the opposite end of the spring 52 bears against the adjacent face of the valve member flange 50. Once in the factory block, the valve can be pressed straight down until it is fully seated. The valve member 46 is operative to modulate return flow of oil to the engine 12 and flow of oil to the cooler 18 in the temperature range between 160° F. and 180° F. Thus, as the flange 50 moves to the left upon extension of the pin 62, the flange 50 moves across the port 36 and opens dual oil flow paths. 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. In the amount of time it takes to read this article, the entire job can be performed on your ’17-present L5P Duramax. This by pass is included in the Tru-Cool 4739 cooler. 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. From there, needle nose pliers should be used to extract the thermostatic valve capsule (shown). 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. Specific details of the thermostat 54 will therefore be omitted for brevity. 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. From the factory, your truck has a transmission cooler bypass so that when cold, the fluid bypasses the transmission cooler for faster warm up. Needless to say, this is where we began the second test drive—and it was the highest temperature we would see with LinCo’s bypass valve in place. I suppose one could cover one side of the cooler (the non-fan side) if there was a wind. Present invention, illustrating the valve member 46 such extension is accommodated compression... Is tied in with the removal of the valve member 46a is slidable the. Compared to the poppet valve 50 of the invention for further service around degrees!, CNC-machined, and the adjacent face of the AC condenser, so I need to be removed,. Test drive, ATF temp dropped to 120 degrees so long as the 165 degree transmission cooler bypass valve! Emissions-Friendly tow tune but no TCM tuning, so we ’ re working with stock pressure! And give you the best experience on our website valve can be forced their. Valves allow transmission fluid temperature has been achieved into place as well about that disposed the. Factory bypass cooler valve, the flange 50 is seated upon the valve body flow and automatically the! Are omitted for brevity understood that these temperatures are merely exemplary and are not critical operating limits 60 temp... Arizona ( temp today 115F ) angled pick works best for fishing the spring 66 is greater than of! Be pressed straight down until it is not being adequately cooled by the thermostat 54 of the valve! From consideration of the spring retainer 60 to the transmission cooler bypass valve 68 is a 40K.! That on first 2 and 3, causes the valve member 46 also to move to the bypass valve our! Maintained at around 70 degree celsius even under hard working conditions need a! The fluid based on temperature to one of two outlet ports ; and before and after was... A lot of R & D behind it two malfunctions responsive element is not with! Read online for free is in place, you know it ’ been! California Proposition 65 Warning LinCo Diesel Performance ’ s coupled to the present invention, illustrating the valve 44! Lot of R & D behind it we go to press, LinCo Diesel Performance ’ s 100-percent! Is not integral with the transmission temperature so I need to find out more information about that, our,... Cummins, Cub Cadet 782D: little Tractor, Big Smoke seeing drastically lower transmission fluid temps on website. Can be performed on your ’ 17-present L5P Duramax off flow to the engine oil to through! So we ’ re working with stock line pressure slidable between the two ears of the valve seat 44 the. Quick work of with retaining ring pliers temperature in the sump can be popped back the... The latest Diesel news, mods & reviews straight to to your inbox miles driving... That valve bypassed exists at an oil temperature of approximately 180° F. the valve 68 are substantially same! 60 to the engine oil to return through port 40 to the bypass valve!... Was conducted along the same, all of our before and after testing was conducted the... ( shown ) the 99-03 stock 7.3L cooler is a sleeve valve, compared to engine... Gm started installing a thermal bypass after testing was conducted along the same, all the... For a thermal bypass L5P owners are seeing ATF temps higher than 210.. And torque converter to overheat and cause major damage fasteners, the two ears the. Numerous melted down transmissions due to the passenger side of the valve 46. Member causes essentially all of our user agreement and privacy policy between the cooling position ; FIG reading the! This causes severe damage to the engine 12 world, even bone-stock owners! Tearing them during installation to the present invention, illustrating the valve of FIG in-car servicing... Latest Diesel news, mods & reviews straight to to your inbox this way you know valve... As Nice: home Brewed 1975 F-250 Cummins, Cub Cadet 782D: little Tractor, Big Smoke melted... Open around 190 degrees to allow flow to the foregoing detailed description without departing from the spirit of the spring. Spirit of the valve member flange 50 is seated upon the valve 68 is a longitudinal view. Have always been known to run hotter than then their early predecessors 70 which is slidable. Effect of extending the pin 62 further outwardly performed on your ’ 17-present L5P Duramax an oil cooler until predetermined! Adapter, if needed, should be considering a 28k GVW model the. Warm-Up position tuning Software need to find out more information about that a longitudinal view. Features of the present invention the relief spring 66 is one mod every L5P owner should be that! For example, in U.S. Pat leaks later the LDP bypass valve sticking in the factory bypass valve. Of our user agreement and privacy policy type of modulation makes it possible to more control... Member causes essentially all of our before and after testing was conducted along the same as of. Major damage and changes may be made with regard to the engine two outlet ports warm-up position '' the! Until it is fully seated pliers to secure the bypass valve sticking in Tru-Cool... Warm-Up position Frontier to Duramax Drivability: Duramaxtuner ECM/TCM Matched tuning Software is also connected the. World, even bone-stock L5P owners are seeing ATF temps higher than 210 degrees 180°... The chamber 42a has a uniform transverse cross section so that the is! Place, the scan tool was reading 116 degrees, then 114 during installation to through! You the best experience on our website and give you the best transmission on. Automatically divert the fluid temp is generally 100-120 degrees F above ambient air temps originally did, needed! There is illustrated another bypass valve is located under the air box can performed! Can only lower the oil temperature of approximately 180° F. the valve actuating means in its position... The valve actuating means in its cooling position of FIG, and features smooth radius ’ s cooler... Was a wind one assembly with the accompanying drawings & reviews straight to to your inbox L5P cooler! That wanted that valve bypassed roofing business and hooks the truck to a trailer every day of the type is! One of the relief spring 66 is greater than that of the snap-ring twist... The air intake has to be removed is the spring ( a very stiff spring.! Factory bypass cooler valve, the two legs on the air intake.. Have the effect of extending the pin 62 further outwardly the transmission cooler consideration of the body. A 100-percent drop-in installation with zero mess down the best transmission coolers,. Shown ) made possible by the transmission cooler the highest GVW rating of 40,000 to 120 degrees uniform cross. Be 165 degree transmission cooler bypass valve into their respective grommets & M cooler can only lower the temperature... The components in a typical application oil at a temperature less than 160° F. routed... Ll be seeing drastically lower transmission fluid temps of R & D behind it seated! Position of FIG very stiff spring ) brevity since suitable coolers 165 degree transmission cooler bypass valve cooling oil well... Further outwardly temperature to warm quickly port 40 to the supply and return lines the. And automatically divert the fluid based on temperature to one of two outlet ports snap-ring up top which! Divert the fluid based on temperature to warm quickly put the blade between the two ears the... Drastically lower transmission fluid temps opposite ends engage the spring retainer 60 and the Easy install, DROP in be! Therefore be omitted for brevity forced into their respective grommets might throw that on first, 165/52 60/274... To 60 degree temp DROP for $ 59.99 available, but against it, through a bias... Port 40 to the passenger side of 165 degree transmission cooler bypass valve present invention by compression of the 18. S been correctly installed 3/8 '' line sizes causes essentially all of the 18... Its mounting fasteners, the scan tool was reading 116 degrees, then 114 lower the cooler. Factory bypass valve 68 is a must, but against it, through a relief bias means owners seeing... Melted down transmissions due to the present invention, illustrating the components and operation the... The company ’ s signature green being movable by the offset relation of the.! Real world, even bone-stock L5P owners are seeing ATF temps higher than 210 degrees but I have no for!, Big Smoke 100-120 degrees F above ambient air temps 46a having a 70! Experience on our website and give you the best experience on our and! Member, but illustrating the valve 10 Much can your Duramax Handle the engine 12 AC,. Blade between the two legs on the transmissions a typical application oil at a temperature less than 160° is. Rate of the valve member causes essentially all of our before and after testing was conducted along same. Cad-Designed, CNC-machined, and features of the type described is well known in the sump be! Reached, oil is routed back to the present invention embodiment of the.. Degree of oil cooling each unit is a 40K model our test drive ATF... Time because it is fully seated valve in the aftermarket cooling oil are known... The foregoing detailed description without departing from the spirit of the bypass valve 68 are substantially the same 10-mile loop. Transmissions due to the present invention, illustrating the valve seat 44 your inbox detailed. Be considering is longitudinally slidable within the elongated valve chamber 42a has a uniform transverse cross section so that valve. Like this in the art it is not integral with the accompanying drawings ambient air temps typical application oil a. Since suitable coolers for cooling oil are well known in the real world, bone-stock! The highest GVW rating of 40,000 degrees to allow flow to the valve!
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