TH400 Hard Parts

Heavy duty OEM cast aluminum 5 friction direct clutch piston. This piston features casting # 8670208 and is @ .690" thick. This piston does not include a checkball. Fits all OEM five friction direct clutch housings with a checkball.

Heavy duty OEM cast aluminum 5 friction forward clutch piston. This piston features casting # 8623709 and is @ .745" thick.This piston does not include a checkball. Fits all OEM forward clutch housings.

Heavy duty OEM cast aluminum intermediate clutch piston.

Remanufactured TH400 4" gasket style short tail large yoke extension housing. This component is thoroughly cleaned and inspected. Mount bolt holes are "chased" to verify thread integrity, and fit with new mounting bolts. Assembly is completed with the installation of a new extension housing bushing and extension housing seal. Fits all year Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac TH400 transmissions with 4" extension housing and large diameter yoke.

Pristine OEM direct clutch bearing plate. Cleaned, inspected, and hand decked.

Remanufactured large bushing bore short extension housing with new bushing, seal gasket, six housing to case bolts, and two transmission mount bolts. Housing is fully cleaned, sand blasted, and inspected.