2004.5-2007 Ram 5.9L Cummins Parts & Accessories

The mighty Ram 5.9L Cummins under the hood of your 2004.5-2007 Ram 2500 and 3500 is capable of so much more than when it left the factory, and Tier One has all the Ram 5.9L Cummins parts and tuning you need to unlock its full potential. We carry everything from our own high-performance Tier One Ram Cummins transmissions and transmission rebuild kits to aftermarket 5.9L Cummins tuning, 5.9L Cummins turbo upgrades, 5.9L Cummins fuel injectors, Ram 2500 & 3500 leveling kits, Ram 2500 & 3500 lift kits, and Ram exterior upgrades that will set your custom 5.9L Cummins Ram apart from the rest of the herd. Tier One has all the performance upgrades you need for your awesome 2004.5-2007 Ram 5.9L Cummins all in one place! Also check out our built 48RE transmissions. Contact Tier One or call 602-399-5484 if you can't find what you're looking for. If your factory transmission is slipping or you are pushing serious horsepower, a stock replacement just won't cut it, so take a look at our 2004.5-2007 Ram 5.9L Cummins Complete Transmissions. The factory converter is often the first weak point to fail when you start adding torque, but you can put more power to the ground without shuddering by upgrading to one of our 2004.5-2007 Ram 5.9L Cummins Torque Converters. Heat is the number one killer of transmissions, especially when towing heavy loads up steep grades, so keep your fluid temps in check with our 2004.5-2007 Ram 5.9L Cummins Transmission Coolers. Low line pressure causes clutch failure and poor shifting, but you can fix common cross-leaks and improve your shift firmness by swapping in one of our 2004.5-2007 Ram 5.9L Cummins Valve Bodies. Finally, whether you need a deep transmission pan for extra fluid capacity or a billet input shaft for strength, we have the components you need in our section of 2004.5-2007 Ram 5.9L Cummins Transmission Parts.