Size: 11" x 6" x 3/4". Installing a transmission cooler can prevent transmission burnout. Any thoughts, comments, or insights would surely be helpful. The bypass device of this invention allows ATF to selectively bypass an ATF cooler when the ATF temperature is substantially low enough to allow the ATF to be free rom any requirement of cooling, thus allowing the ATF within an appropriate temperature to circulate in an automatic transmission. Insufficient Flow. The OE thermal bypass valve is designed to route bypass the transmission cooler and cold temperatures in in order to bring the transmission up to operating temperature faster. This heat is absorbed by the oil in the transmission and is extracted through a cooling system. Customers who bought this item also bought. Also going to install a trans temp gauge, and thermal bypass, so the atf won't go through the cooler until it's warmed up. As I wait on a new radiator to arrive, the thought of bypassing the OEM tranny cooler, and running the aux cooler with built in thermal bypass by itself, crossed my mind. The 99-03 stock 7.3L cooler is a 28k GVW model. WITH COLD WEATHER BYPASS KIT. Bolts to the side of the transmission and the cooler lines connect to it. A transmission cooler is a must, but I have no need for a thermal bypass. This cooler is rated at 40,000 GVW and measures 8.5"x22.75"x1.25". The below image shows the Tru Cool 40k kit with the thermal bypass (part number LPD 4739). Available from these sellers. TRU-COOL MAX LPD4739 TRANSMISSION OIL COOLER. Since I'm in FL, we rarely see super cold temps. Debris in the stock cooler bypass valve can cause it to jam the internal valve keeping it in recirculation mode. We offer a Full Service Kit as well as Bypass Valve as a separate item (you will need to source your own service kit). A lot of people know about the great transmission cooling products Tru Cool⢠offers, but sometimes itâs confusing as to whether or not a thermal bypass is needed with a cooler. ATS 68RFE / AS69RC Thermal Bypass Valve Up-Grade, w/ Billet Filter Coupler, 2013-2018 RAM 6.7L Cummins . Which is a great idea in theory. Transmission Cooler Thermal Bypass Valve TBV Deleate For 13-18 Ram 6.7L Cummins Parts Sold Here Prosource Diesel OIL COOLER, TRU-COOL MAX WITH REMOTE THERMAL BYPASS. I was wondering if there is a thermal bypass already inline somewhere with my existing factory HD tranny tube and fin, and is there any need for a bypass where its so hot and never freezes? 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. Thermal bypass included. Tru Cool Max 40k Gvw Transmission Cooler Tru cool max transmission cooler hd lpd4739 with thermal bypass tru cool max 40k gvw transmission cooler tru cool 40k transmission cooler review guide tru cool 40 000 gvw lpd4739 transmission cooler thermal bypass 40k. Thatâs why a sturdy thermal bypass valve is essential for the Jeep JK Wrangler, along with a ⦠For newer models with a 6L80 or 6L90 however (2014+), the transmission cooler lines utilize a built in thermostat that remains closed and does not flow to the cooler ⦠Tru-Cool is the leader in low pressure drop, automatic transmission coolers, also known as LPD. The few times we get near the freezing mark, is overnight during our short 'winters', and the truck is garage parked. This is the ultimate cooler for heavy towing and is a must for heavy duty applications, including racing. The coolerâs fitting should not be smaller than the lines. The stock cooling systems of both the 68-RFE and Aisin AS69RC utilize an in-line thermal bypass valve that controls the flow of fluid to the transmission cooler. ... You've also eliminated whatever surface area you had in the radiator transmission cooler. It is much easier to keep trans temps lower in older trucks due to their simple transmission cooler line setup. 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. Something to think about, GM builds this stuff with the tolerances set for a given temperature, changing the temp will change the clearances, don't fix something that isn't broken. The smaller lines will restrict the transmission fluid flow. The LPD4739 trans cooler includes a thermal bypass. With Thermal Bypass. Whats people lookup in this blog: Tru Cool Transmission Cooler Thermal Bypass This is the ultimate cooler for heavy towing and is a must for heavy duty applications, including racing. Page 1 of 1 Start over Page 1 of 1 . Heat is what kills an automatic transmission. The Thermostatic Valve blocks the cooler flow until the desired operating temperature is reached. How-to: Bypass Radiator Transmission Cooler - PBR. Can bypass the stock cooler â 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. Is this how I should do it: Transmission to radiator, then to thermal bypass, then to cooler. This is a stacked plate, low pressure drop unit. THERMAL BYPASS VALVE TWO STYLES OF MOUNTING HARDWARE. Cooler size: 8.5" x 22.75" x 1.25" The fittings on this cooler are 3/8" inverted flare. In the case of the 4R100 itâs not a problem when it comes to flushing the cooler lines and cooler, because it bolts to the transmission and is separate from the lines. ... Air does not have as large of a thermal coefficient, so you need more surface area for air flow to accomplish the same amount of cooling. Twice the Cooling for Your Transmission. When an auxiliary transmission oil cooler is required for your vehicle, Tru-Cool Max delivers optimal protection with double the cooling performance of our other products. The 1500 trucks do have a "thermostat" if you will, its a cooler bypass. Once it reaches the designated operating temperature of the transmission, the cooler bypass opens up and begins to cool the transmission ⦠Not only is this one of the largest transmission coolers available, but has the highest GVW rating of 40,000. Rapid-Cool⢠Transmission Oil Cooler Kit (696) by Hayden®. When an auxiliary transmission oil cooler is required for your vehicle, Tru-Cool Max delivers optimal protection with double the cooling performance of our other products. Eliminate the factory transmission bypass valve in your 2013-2018 Dodge 5.9L Cummins with the BD-Power 1061528 68RFE Transmission Cooler Thermal Bypass Valve Upgrade. This shopping feature ⦠Hey I have a few questions regarding the cooler on the side of block. This cooler has 3/8" inverted flare fittings and comes with a thermal bypass valve so you can use this cooler in cold weather and the fluid will bypass until the transmission comes up to operating temeratures. The AB60 transmission has a warmer/cooler on the side of it that takes engine coolant off at the heater supply hose near the firewall and returns the coolant to the heater return hose. Fitted to the Australian delivered Ford Ranger & Mazda BT-50 6 speed automatic transmissions is a transmission cooler thermostatic cooler by-pass valve. This is a Must for any truck that has a 68-RFE or Aisin AS69RC transmission in it. 68-RFE Trans Cooler Bypass Block, Fits 2013 and Up Cummins with 68-RFE or Aisin AS69RC Transmission. From the factory, your truck has a transmission cooler bypass so that when cold, the fluid bypasses the transmission cooler for faster warm up. Maintain lower temperatures in your transmission and lubricant with Tru-Cool and extend the life of the vehicle you depend on. One of my transmission lines were leaking so I bought all new lines installed them and someone told me the stock cooler on side of block is known for leaking internally mixing the coolant/trans fluid and destroying the transmission so after some research I found a fleece coolant bypass kit that bypasses the cooler on ⦠Check out our Thermal Cooler Bypass Valves below: When it works it's great, but these thermostats have a problem with sticking in the bypass position which blocks the transmission fluid from flowing through the transmission cooler. Maximum Protection for Your Vehicle. Our most popular transmission cooler from Tru-Coolâ¢, part number LNG-47391 , has a sister cooler ⦠This is the offender behind the warm-running Allison condition in your â17-â19 GM HD: the factory transmission cooler thermal bypass valve. GM calls it the Transmission Fluid Cooler Thermal Bypass Valve, you can imagine just what it's function is by the name. This thermal bypass is typically used in areas where the climate is much colder, and helps the fluid reach optimal operating temps before completely flowing through the system. For cold weather applications, use this LPD4739 with the thermal bypass. In most diesel applications, the transmission line is large. This premium transmission oil cooler features a unique plate and fin design, which is 33% more efficient than a comparable tube and fin design. Temp sensor plumbed in between transmission and radiator. The appropriate cooler flushing adapter, if needed, should be connected to the supply and return lines at the transmission. The result of a thermostat that's stuck in bypass mode can be an overheated transmission. Tru-Cool Max. Another example would be a thermal mechanical by-pass, like the one shown in Fig 2 or like the one Fig 3. This cooler is a "stand-alone" cooler designed to handle the heat load by itself, but in the 99-03 Ford trucks it can be used as an add-on cooler in addition to your OEM cooler. Upon closer inspection, they diagnosed the factory bypass valve as the culprit and promptly set to work making a drop-in replacement. Located in the passengers side of the transmission housing under the valve body assembly. Wholesale Automatics Thermal Cooler Bypass Valve improves the reliability of your transmissionâs cooling system. The transmission cooler does a decent job of keeping transmission fluid temperatures in check, but only if the fluid can reach it. True, there are plenty of means of maintaining transmission fluid cool with external coolers, but they wonât do you any good if the fluid never makes it to the cooler. This Tru-Cool Max 4739 unit is a 40K model. Instead, the hot fluid bypasses back to the transmission and just gets hotter. 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