2007.5-2009 Ram 6.7L Cummins Transmission Coolers
It's not hard to get the transmission powering your 6.7L Ram Cummins running hot, especially when you're towing or hauling heavy loads at higher power levels than stock. That's why an aftermarket transmission cooler is a great option for practically any 2007.5-2009 Ram 2500 or 3500 6.7L Cummins build. These performance transmission coolers for Ram 6.7L Trucks are larger than stock and feature more efficient designs that allow them to dissipate more heat more effectively out of your Ram's transmission fluid, which greatly lowers your Ram's transmission temperatures when under load. We carry both direct-fit transmission coolers that are extremely easy to install, as well as universal auxiliary transmission coolers that can give your Ram even more cooling potential.
If your truck has already suffered from heat damage and is slipping in gear, a cooler alone won't fix the internal clutches, so you may need to look at replacing the unit with one of our 2007.5-2009 Ram 6.7L Cummins Complete Transmissions. An unlocking torque converter creates significant friction and heat, so to reduce heat generation at the source while improving towing performance, consider upgrading to one of our 2007.5-2009 Ram 6.7L Cummins Torque Converters. Sometimes overheating is caused by inefficient fluid routing or cross-leaks inside the case, but you can improve fluid flow and reduce operating temperatures by installing one of our 2007.5-2009 Ram 6.7L Cummins Valve Bodies. Another great way to help manage heat is by increasing your overall fluid volume, so add several quarts of extra capacity and help dissipate heat by adding a deep pan from our section of 2007.5-2009 Ram 6.7L Cummins Transmission Parts.
About 2007.5-2009 Ram 6.7L Cummins Transmission Coolers
Heat is the number one killer of the 68RFE transmission, and the 2007.5-2009 Ram 6.7L Cummins trucks are no exception. While the 6.7L engine produces massive torque, it also generates significant heat that can quickly overwhelm the factory transmission cooler, especially when towing heavy loads up steep grades or sitting in stop-and-go traffic. Once transmission fluid temperatures spike, the fluid breaks down, leading to clutch slippage, seal damage, and eventually, a complete transmission failure. To keep your 3rd Gen Ram running cool and reliable, Tier One offers high-performance cooling upgrades that vastly outperform the stock setup. Whether you need a massive auxiliary cooler with its own airflow source or a direct-fit replacement to upgrade the factory location, we have the solution to keep your transmission in the safe zone.
Types of 2007.5-2009 Ram 6.7L Cummins Transmission Coolers
We offer two primary ways to upgrade the cooling on your 2007.5-2009 Ram: adding a fan-assisted auxiliary cooler for maximum temperature drops or installing a high-capacity direct-fit cooler for a seamless factory-style upgrade. Auxiliary Fan-Assisted Coolers (The Tier One Kit): For trucks that see extreme duty—like heavy towing at slow speeds or aggressive off-roading—airflow is often the limiting factor. The Tier One Auxiliary Transmission Cooler Kit solves this by utilizing a Derale 15870 40-Row Hyper-Cool Extreme Remote Cooler. Because it has its own fan, it doesn't rely on your truck's speed to cool the fluid.- Active Cooling: Equipped with a 10" waterproof/dustproof electric fan pushing 800 CFM, providing massive cooling power even when the truck is stationary.
- Extreme Capacity: The 40-row stacked plate design is rated at 67,000 BTUs per hour.
- Versatile Mounting: Can be mounted remotely anywhere space permits (like under the bed or behind the bumper) to keep heat away from the other cooling stacks.
- Direct Fitment: Installs directly into the factory location for a clean, hassle-free upgrade without cutting or custom bracketry.
- Superior Core Design: Features a significantly thicker core and increased fluid capacity compared to the stock unit, allowing for greater heat dissipation.
- Reliability: Built with durable end tanks and a robust core to handle higher pressures and temperatures than the OEM cooler.
