Repair or upgrade the transmission cooling in your 2020-2022 Jeep Wrangler JL 3.0L EcoDiesel with Direct-Fit Transmission Coolers & Lines. Get increased cooling efficiency with an aftermarket transmission cooler that has a greater fluid capacity and core volume. Replace the problematic factory thermal bypass valve (if equipped) with a performance transmission cooler thermal bypass valve. The cooler lines are available in factory replacement or performance durable braided hoses with billet -AN fittings. Mishimoto, Dorman, BD-Power, and more top-notch manufacturers are available.