Fitzall TH400 Turbo 400 Rear Case Extension

Professional-grade rear extension housing for the GM TH400 Turbo 400 3L80 heavy-duty automatic transmission. Manufactured by Fitzall to exacting OEM specifications, this extension housing is a direct replacement for worn or damaged original components. The TH400 is the workhorse of classic GM drivetrains, and quality hard parts are essential for reliable operation.

Compatible with all TH400 transmissions from 1964 to 1990 in Chevrolet Corvette, Camaro SS, Chevelle SS, C10/C20 trucks, GMC trucks, Pontiac GTO, Firebird, Buick GSX, and Oldsmobile 442. Precision-machined for perfect fitment and long service life under demanding conditions.