GM TH400 Turbo 400 Extension Housing 9-inch

Premium 9-inch extension housing for the GM TH400 Turbo 400 3L80 heavy-duty transmission. Features long tail housing for improved cooling and protection. The TH400 generates significant heat under load, making proper fluid capacity and cooling critical for transmission longevity.

Fits all 1964-1990 TH400 applications in Chevrolet, GMC, Pontiac, Buick, and Oldsmobile vehicles. Professional quality construction ensures long service life.