Collection: Transmission Rebuild Kits

Completely restore or heavily upgrade your gearbox with complete transmission rebuild kits, master overhaul packages, and service seal sets. Over years of hard operation, internal clutch friction plates wear down, rubber piston seals harden, paper gaskets weep fluid, bearings develop play, and synchronizer rings wear out—resulting in slipping gears, delayed engagement, harsh shifting, high operating temperatures, or complete transmission failure.

Whether you're carrying out a routine OEM-spec refresh on a daily commuter, rebuilding a heavy-duty automatic for diesel towing and high-torque work trucks, or assembling a high-horsepower race transmission for drag, track, and off-road builds, having a matched component kit ensures proper hydraulic sealing and reliable torque holding. Explore master overhaul kits, banner kits, friction modules, steel reaction plate sets, paper and rubber gasket packs, metal-clad front and rear seals, sealing rings, internal bushings, roller bearings, carbon synchronizer (synchro) rings, snap rings, and valve body recalibration shift kits across automatic, manual, and dual-clutch (DCT) gearboxes.