TH400 Turbo 400 Reverse Boost Valve 1965-1990 CTS-TH400-VLB-4856 Sonnax

Sonnax TH400 Turbo 400 Reverse Boost Valve

Overview

Professional-grade reverse boost valve for the GM TH400 Turbo 400 3L80 heavy-duty automatic transmission. Manufactured by Sonnax to exacting OEM specifications, this boost valve 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.

All parts ship from our warehouse with quality inspection. Same-day shipping on most orders. Professional installation recommended.