The TH400 Billet Valve Body from TCI is optimized to allow for reverse manual,
reverse transbrake and reverse engine braking operation, and quicker shifting.
A high-performance replacement for OEM cast iron versions, the TH400 Billet
Valve Body features re-routed passages that are simplified, shorter and highly
radiused for improved transmission fluid flow and shift speed. It retains reverse
gear position, eliminating the need to use a transbrake button. Machined billet
aluminum construction offers weight savings without compromising strength.