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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. Maintain lower temperatures in your transmission and lubricant with Tru-Cool and extend the life of the vehicle you depend on. 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. 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. A transmission cooler is a must, but I have no need for a thermal bypass. Customers who bought this item also bought. Check out our Thermal Cooler Bypass Valves below: Thermal bypass included. 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 … 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 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. 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. Heat is what kills an automatic transmission. 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. This is a Must for any truck that has a 68-RFE or Aisin AS69RC transmission in it. 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. This is the offender behind the warm-running Allison condition in your ’17-’19 GM HD: the factory transmission cooler thermal bypass valve. Fitted to the Australian delivered Ford Ranger & Mazda BT-50 6 speed automatic transmissions is a transmission cooler thermostatic cooler by-pass valve. The Thermostatic Valve blocks the cooler flow until the desired operating temperature is reached. Once it reaches the designated operating temperature of the transmission, the cooler bypass opens up and begins to cool the transmission … 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 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. This is the ultimate cooler for heavy towing and is a must for heavy duty applications, including racing. WITH COLD WEATHER BYPASS KIT. This premium transmission oil cooler features a unique plate and fin design, which is 33% more efficient than a comparable tube and fin design. 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 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. Tru-Cool Max. THERMAL BYPASS VALVE TWO STYLES OF MOUNTING HARDWARE. Bolts to the side of the transmission and the cooler lines connect to it. Wholesale Automatics Thermal Cooler Bypass Valve improves the reliability of your transmission’s cooling system. The cooler’s fitting should not be smaller than the lines. Our most popular transmission cooler from Tru-Cool™, part number LNG-47391 , has a sister cooler … ATS 68RFE / AS69RC Thermal Bypass Valve Up-Grade, w/ Billet Filter Coupler, 2013-2018 RAM 6.7L Cummins . The 99-03 stock 7.3L cooler is a 28k GVW model. The result of a thermostat that's stuck in bypass mode can be an overheated transmission. This is the ultimate cooler for heavy towing and is a must for heavy duty applications, including racing. 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. Rapid-Cool™ Transmission Oil Cooler Kit (696) by Hayden®. ... 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. The appropriate cooler flushing adapter, if needed, should be connected to the supply and return lines at the transmission. 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. It is much easier to keep trans temps lower in older trucks due to their simple transmission cooler line setup. Size: 11" x 6" x 3/4". Twice the Cooling for Your Transmission. We offer a Full Service Kit as well as Bypass Valve as a separate item (you will need to source your own service kit). The few times we get near the freezing mark, is overnight during our short 'winters', and the truck is garage parked. This Tru-Cool Max 4739 unit is a 40K model. 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). 68-RFE Trans Cooler Bypass Block, Fits 2013 and Up Cummins with 68-RFE or Aisin AS69RC Transmission. 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. 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. Is this how I should do it: Transmission to radiator, then to thermal bypass, then to cooler. Insufficient Flow. Upon closer inspection, they diagnosed the factory bypass valve as the culprit and promptly set to work making a drop-in replacement. Tru-Cool Long brand Transmission Cooler External Thermal Bypass 708-4739P6 by Long Tru-Cool 4.5 out of 5 stars 16 ratings. The 1500 trucks do have a "thermostat" if you will, its a cooler bypass. Installing a transmission cooler can prevent transmission burnout. 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. 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? Temp sensor plumbed in between transmission and radiator. Page 1 of 1 Start over Page 1 of 1 . Tru-Cool and extend the life of the largest transmission coolers, also known as LPD this one the... 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