Temp sensor plumbed in between transmission and radiator. Heat is what kills an automatic transmission. With Thermal Bypass. From the factory, your truck has a transmission cooler bypass so that when cold, the fluid bypasses the transmission cooler for faster warm up. This is the offender behind the warm-running Allison condition in your ’17-’19 GM HD: the factory transmission cooler thermal bypass valve. Rapid-Cool™ Transmission Oil Cooler Kit (696) by Hayden®. Installing a transmission cooler can prevent transmission burnout. Once it reaches the designated operating temperature of the transmission, the cooler bypass opens up and begins to cool the transmission … Tru-Cool Max. Page 1 of 1 Start over Page 1 of 1 . Customers who bought this item also bought. Debris in the stock cooler bypass valve can cause it to jam the internal valve keeping it in recirculation mode. For cold weather applications, use this LPD4739 with the thermal bypass. The 1500 trucks do have a "thermostat" if you will, its a cooler bypass. Our most popular transmission cooler from Tru-Cool™, part number LNG-47391 , has a sister cooler … Size: 11" x 6" x 3/4". Is this how I should do it: Transmission to radiator, then to thermal bypass, then to cooler. Which is a great idea in theory. Another example would be a thermal mechanical by-pass, like the one shown in Fig 2 or like the one Fig 3. 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. Since I'm in FL, we rarely see super cold temps. 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. 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. Fitted to the Australian delivered Ford Ranger & Mazda BT-50 6 speed automatic transmissions is a transmission cooler thermostatic cooler by-pass valve. The LPD4739 trans cooler includes a thermal bypass. 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. 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 is the ultimate cooler for heavy towing and is a must for heavy duty applications, including racing. In most diesel applications, the transmission line is large. Transmission Cooler Thermal Bypass Valve TBV Deleate For 13-18 Ram 6.7L Cummins Parts Sold Here Prosource Diesel It is much easier to keep trans temps lower in older trucks due to their simple transmission cooler line setup. The appropriate cooler flushing adapter, if needed, should be connected to the supply and return lines at the transmission. Instead, the hot fluid bypasses back to the transmission and just gets hotter. 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 … The transmission cooler does a decent job of keeping transmission fluid temperatures in check, but only if the fluid can reach it. Thermal bypass included. 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. Not only is this one of the largest transmission coolers available, but has the highest GVW rating of 40,000. A lot of people know about the great transmission cooling products Tru Cool™ offers, but sometimes it’s confusing as to whether or not a thermal bypass is needed with a cooler. In the case of the 4R100 it’s 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. 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. Check out our Thermal Cooler Bypass Valves below: This is the ultimate cooler for heavy towing and is a must for heavy duty applications, including racing. GM calls it the Transmission Fluid Cooler Thermal Bypass Valve, you can imagine just what it's function is by the name. This premium transmission oil cooler features a unique plate and fin design, which is 33% more efficient than a comparable tube and fin design. Wholesale Automatics Thermal Cooler Bypass Valve improves the reliability of your transmission’s cooling system. Tru-Cool is the leader in low pressure drop, automatic transmission coolers, also known as LPD. ATS 68RFE / AS69RC Thermal Bypass Valve Up-Grade, w/ Billet Filter Coupler, 2013-2018 RAM 6.7L Cummins . The result of a thermostat that's stuck in bypass mode can be an overheated transmission. Bolts to the side of the transmission and the cooler lines connect to it. The smaller lines will restrict the transmission fluid flow. Hey I have a few questions regarding the cooler on the side of block. The 99-03 stock 7.3L cooler is a 28k GVW model. The Thermostatic Valve blocks the cooler flow until the desired operating temperature is reached. Tru-Cool Long brand Transmission Cooler External Thermal Bypass 708-4739P6 by Long Tru-Cool 4.5 out of 5 stars 16 ratings. TRU-COOL MAX LPD4739 TRANSMISSION OIL COOLER. Twice the Cooling for Your Transmission. Whats people lookup in this blog: Tru Cool Transmission Cooler Thermal Bypass This is a Must for any truck that has a 68-RFE or Aisin AS69RC transmission in it. Located in the passengers side of the transmission housing under the valve body assembly. Insufficient Flow. Available from these sellers. 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 … 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? 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. How-to: Bypass Radiator Transmission Cooler - PBR. 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. 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. This cooler is rated at 40,000 GVW and measures 8.5"x22.75"x1.25". 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. The cooler’s fitting should not be smaller than the lines. This shopping feature … 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. 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. A transmission cooler is a must, but I have no need for a thermal bypass. 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. ... You've also eliminated whatever surface area you had in the radiator transmission cooler. We offer a Full Service Kit as well as Bypass Valve as a separate item (you will need to source your own service kit). ... 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. 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. The below image shows the Tru Cool 40k kit with the thermal bypass (part number LPD 4739). 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. This heat is absorbed by the oil in the transmission and is extracted through a cooling system. Maximum Protection for Your Vehicle. Upon closer inspection, they diagnosed the factory bypass valve as the culprit and promptly set to work making a drop-in replacement. This is a stacked plate, low pressure drop unit. 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. WITH COLD WEATHER BYPASS KIT. The few times we get near the freezing mark, is overnight during our short 'winters', and the truck is garage parked. THERMAL BYPASS VALVE TWO STYLES OF MOUNTING HARDWARE. Any thoughts, comments, or insights would surely be helpful. That’s why a sturdy thermal bypass valve is essential for the Jeep JK Wrangler, along with a … 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. 68-RFE Trans Cooler Bypass Block, Fits 2013 and Up Cummins with 68-RFE or Aisin AS69RC Transmission. Maintain lower temperatures in your transmission and lubricant with Tru-Cool and extend the life of the vehicle you depend on. Cooler size: 8.5" x 22.75" x 1.25" The fittings on this cooler are 3/8" inverted flare. True, there are plenty of means of maintaining transmission fluid cool with external coolers, but they won’t do you any good if the fluid never makes it to the cooler. This Tru-Cool Max 4739 unit is a 40K model. OIL COOLER, TRU-COOL MAX WITH REMOTE THERMAL BYPASS. 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