Mishimoto 2013+ Dodge Ram 6.7L Cummins Thermal Bypass Valve KitThe transmission is the backbone of your 2013? 2018 Dodge Ram 6. 7L Cummins. It? s responsible for transmitting up to 930 lb ft of torque from the engine to the wheels. That much power generates a lot of heat and if that heat isn? t dissipated it can destroy your transmission. The transmission cooler does a good job of keeping transmission fluid temperatures in check, but only if the fluid can reach it. The stock cooling system of both the 68 RFE and