GM TH400 Forward Clutch and Direct Clutch Assembly w/ Carbon Fiber Clutches - STD many rebuilders wish to increase

many rebuilders wish to increase line rise

Stay on track with Speedmaster 9 in

These Speedmaster aluminum pulleys are made from a 356 aluminum alloy that is heat-treated to T-6 specs

Engineered for durability and precision

GM TH400 Forward Clutch and Direct Clutch Assembly w/ Carbon Fiber Clutches - STD many rebuilders wish to increaseThe Speedmaster forward drum and direct drum assembly are designed to withstand high horsepower with their upgraded 36 element sprag design and carbon fiber friction plate material. Speedmaster GM automatic transmission parts are manufactured using the highest quality materials for strength and durability.