Mishimoto trans cooler available for 2003-2009 Ram pickups with Cummins diesel

To help protect the transmission in your 2003-2009 Ram pickup consider Mishimoto’s transmission cooler.

The stacked-plate designed cooler, which is compatible with 5.9- and 6.7-liter Cummins diesel engines, offers 212 percent increase in core volume and a 244 increase in fluid capacity over the stock trans cooler.

“Whether your 2003–2009 Dodge Ram 5.9- or 6.7-liter Cummins is a dedicated tow vehicle, hardworking fleet truck, or a daily driver with a liking for the drag-strip, you need to ensure that your transmission runs cool,” Mishimoto reports in its press release. “Luckily, Mishimoto has developed a direct-fit transmission cooler to do just that.”

The Mishimoto trans cooler includes a fully serviceable thermostat for fast warm-up in cold climates and thermostat bypass for constant cooling in hot climates. Corrosion-prone quick-disconnect fittings have been eliminated while available -8ORB to -8AN adapters allow the use of AN transmission fluid lines (two required).

According to the company, “The Mishimoto transmission cooler is not only larger than the stock cooler, but more reliable too. 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 our 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. Replacement thermostats can be purchased individually if needed which eliminates the hassle of replacing the entire cooler if the thermostat fails. Owners in cold climates can still enjoy the fast warmup times that the thermostat provides, while owners in hot climates can choose to bypass the thermostat by replacing it with the supplied stainless-steel bypass plug.

To make this cooler even easier to install and service, Mishimoto saves you the trouble of removing seized fittings. The provided CNC-machined, stainless steel hose barb fittings let you cut to the chase, literally. These fittings and the supplied transmission cooler hose allow you to remove the quick-disconnect fittings and connect the stock soft-line to the Mishimoto cooler.

Like all Mishimoto products, this transmission cooler is backed up by the company’s Lifetime Warranty with Accident Protection for worry-free cooling for as long as you own the cooler.