Find the Direct-Fit Transmission Coolers & Lines you need to keep the transmission cool in your 2014-2019 Ram 1500 3.0L EcoDiesel. The increase in fluid capacity and core volume will offer enhanced cooling efficiency with an aftermarket transmission cooler. Performance transmission cooler thermal bypass valves are available for some applications that will replace the problematic factory thermal bypass valve. The cooler lines are available in factory replacement or performance durable braided hoses with billet -AN fittings. There are many high-quality manufacturers accessible, including Dorman, BD-Power, Mishimoto, and others.