Ram 48RE Transmission Rebuilds & Performance
Unleash the Potential of Your 5.9L Cummins.
The 48RE is the last of the "old school" 4-speeds—simple, strong, but prone to failure when you start adding power. Issues like shuttle shifting, band failure, and broken input shafts are common once you tune a 5.9L. At Tier One Transmissions, we build 48REs that finally hold the torque of the legendary Cummins engine.
Choose Your Power Level
- Stage 2 (ST2) 48RE: Our #1 Best-Seller for the 5.9L. Designed for trucks with tuners, injectors, and turbo upgrades. We reinforce the weak points with billet input shafts, upgraded servos, and high-pressure valve bodies to ensure firm, positive shifts under load.
- Stage 1 (ST1) 48RE: The perfect heavy-duty upgrade for daily drivers and tow rigs. We improve on the factory design with better friction materials and hydraulic corrections to fix the notorious "hunting" for gears, giving you a smooth, reliable ride for the long haul.
Whether you are restoring a 3rd Gen Ram or building a street monster, Tier One has the 48RE recipe proven on the streets of Phoenix.
