Transmission Parts

DRT Parts engineers heavy-duty transmission parts for the manual gearboxes that defined the Cummins-powered Dodge Ram: the G56 6-speed (2005.5–2018 Ram 2500/3500) and the NV4500 5-speed that came before it. Whether you’re rebuilding a high-mileage transmission or sealing a leaking PTO opening, our parts are built to OEM fitment standards.

Our DRT HD G56 Main Case is a direct replacement for OEM P/N 05142733AB — the fix when a factory core is impossible to find. Our G56 and NV4500 PTO covers restore a clean seal and stop the gear-oil weeping common to both transmissions. Every part is designed specifically for the Dodge Ram platform, with in-stock items ready to ship. Not sure which transmission you’re running? Contact us and we’ll confirm the right part for your truck.