Find the Direct-Fit Transmission Coolers & Lines you need to keep the transmission cool in your 2014-2018 Jeep Grand Cherokee 3.0L EcoDiesel. Replace the problematic factory thermal bypass valve (if equipped) with a performance transmission cooler thermal bypass valve. Get OEM replacement cooler lines or performance braided hoses with billet -AN fittings for your vehicle. The increase in fluid capacity and core volume will offer enhanced cooling efficiency with an aftermarket transmission cooler. Mishimoto, Dorman, BD-Power, and more top-notch manufacturers are available.