PDD developed this cooler line replacement kit to resolve the common issue of leaking or damaged factory Dodge Cummins transmission cooler lines. Our kit includes all the necessary fittings and hose to completely replace the factory steel lines with new 1/2″ ID cooler lines. The factory routing is maintained, starting at the transmission, then to the heat exchanger on the passenger side of the engine, then forward to the factory air to oil cooler in front of the radiator, and back to the transmission. Premium rubber-coated line clamps enable a clean and secure installation. We have updated the kit to include an adapter which accommodates non-standard ports on aftermarket heat exchangers.
This hose is proudly made in the USA and rated for 300° F and 300 psi, the perfect hose for replacement transmission cooler lines. We have logged 100k+ miles over the course of 5 years on this same hose without incident on a hot rod Cummins tow rig with a built transmission. It truly is the best hose we’ve ever found for transmission cooler line usage. Additionally, we have also made the line available by the foot for custom applications.
We have found most commonly-available hose to fall short when it comes to transmission cooling lines. If you use whatever hose your local auto parts store has, chances are it will fail within a couple years!
Check out the video below for more information: