2004.5-2007 Ram 2500/3500 5.9L Cummins Transmission Coolers & Lines

Keeping your transmission cool is essential for ensuring your Ram 5.9L performs at its best during towing, off-roading, and daily driving. High-performance activities like towing and off-roading place extra stress on your transmission, generating excessive heat that can cause premature damage. To maintain optimal performance and long-term reliability, our selection of transmission coolers and thermal bypasses is the perfect solution! Whether you choose upgraded transmission coolers for enhanced cooling efficiency or thermal bypasses to maintain ideal fluid temperatures, we offer everything you need to keep your transmission running smoothly and reliably. Ram Cummins Fitments: 2004, 2005, 2006, 2007 Ram 5.9L Cummins. Submodel Fitments: Tradesman, Laramie, Laramie Longhorn, Big Horn, Limited, Lone Star, Power Wagon. Some exceptions apply, please see individual product pages for specific fitments.