BD Diesel Race Transmission Part Number: BDD1064234R Race Transmission These BD Diesel Performance automatic transmissions are designed to transfer the power from high-torque modified diesel engines. These BD Diesel transmissions feature redesigned clutch packs with 50 percent more holding surface, steel 6-pin planetary gear carriers, and new lube ports added for high-load areas. Shift strategies and pressure circuits are also modified to handle the high-torque applications. These BD Diesel transmissions are not a re-built factory transmission. They are a custom build transmission. These BD Diesel transmissions are custom tailored to work with your modified truck.