2004.5-2007 Ram 5.9L Cummins Transmissions
The 5.9L Cummins under the hood of your 2004.5-2007 Ram 2500 or 3500 can make a whole ton of extra horsepower and torque with even a few simple mods and tuning, but your stock 48RE transmission is going to struggle to handle it all. Tier One's built transmissions for 2004.5-2007 Ram 5.9L 2500 and 3500 trucks are designed from the ground up to hold more power than stock, while also giving you the reliability you need to rip around the street, tow extremely heavy loads, conquer off-road trails, or tear down the drag strip. We here at Tier One offer complete Ram 5.9L Cummins transmissions in several different power levels and configurations so that you can find the perfect transmission for your Ram's horsepower output, application, or budget. Also check out our 2004.5-2007 Ram 5.9L Cummins transmission rebuild kits or our 2004.5-2007 Ram 5.9L Cummins transmission parts.