Mishimoto Automatic Transmission Oil Cooler for Dodge Ram Cummins 2500/3500 2003-2009

Whether your 2003-2009 Dodge Ram 5.9L/6.7L Cummins is a dedicated tow vehicle, hardworking fleet truck, or a daily driver with a liking for the drag-strip, ensuring that your transmission runs cool is essential. Fortunately, Mishimoto has developed a direct-fit transmission cooler to address this need. The Mishimoto 2003-2009 Dodge Ram 5.9L/6.7L Cummins transmission cooler utilizes a stacked plate core for durable and powerful cooling, with a massive 212% greater core volume and a 244% increase in fluid capacity, providing a significant improvement over the stock cooler.

The Mishimoto transmission cooler is not only larger but also more reliable than the stock cooler. When the stock cooler's thermostat fails, it fails closed, bypassing the cooler and returning hot fluid to the transmission. Mishimoto has solved this common issue by making the thermostat in their 2003-2009 Dodge Ram Cummins transmission cooler fully serviceable and easily bypassed for constant cooling. A port located at the top of the cooler provides easy access to the thermostat for servicing in just a few minutes, allowing owners to replace the thermostat individually if needed, rather than replacing the entire cooler.

For owners in cold climates, the fast warmup times provided by the thermostat can still be enjoyed, while owners in hot climates can choose to bypass the thermostat by replacing it with the supplied stainless-steel bypass plug. To further enhance the ease of installation and service, Mishimoto has eliminated the hassle of removing seized fittings. The provided CNC-machined, stainless steel hose barb fittings allow you to cut directly to the chase, enabling the removal of the quick-disconnect fittings and the connection of the stock soft-line to the Mishimoto cooler.

Like all Mishimoto products, this transmission cooler is designed to fit all 2003-2009 Dodge Ram 5.9L and 6.7L Cummins models. The cooler features a 59% increase in fin surface area, providing enhanced cooling performance. Whether your Dodge Ram Cummins is used for towing, fleet operations, or daily driving, the Mishimoto transmission cooler ensures your transmission stays cool and reliable, even under the most demanding conditions.

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