Automatic Transmissions

Stock automatic transmissions behind a Cummins, Duramax, or Power Stroke were never designed around heavy tuning, oversized tires, or constant towing. Heat, converter wear, weak clutch packs, and valve body problems start showing up once workload and mileage increase.

Stock replacement transmissions, towing-built units, billet torque converters, valve body upgrades, rebuild kits, and internal hard parts for Dodge, Ford, and GM diesel trucks are found in this category. The 47RE, 48RE, 68RFE, Allison, 4R100, and 6R140 platforms all have their own common weak points once power climbs past stock levels.