Sonnax TH400 Turbo 400 Oversized Bushing Kit

Quality oversized bore bushing kit for the GM TH400 Turbo 400 3L80 automatic transmission. Sonnax repair oversized bores designed to restore proper clearances in the heavy-duty TH400. Worn bushings are a leading cause of low line pressure and erratic shifting in high-mileage TH400 transmissions.

Replace all bushings and thrust washers during every rebuild for optimal hydraulic performance. Fits all 1964-1990 TH400 applications in Chevrolet, GMC, Pontiac, Buick, and Oldsmobile vehicles.