Trans Brake Valve Body Kit w/ Adjustable Pressure Regulator

The Coan Racing COA‑12020 Trans Brake Valve Body Kit is a premium performance upgrade engineered for Powerglide transmissions, combining a robust manual valve body with an integrated trans‑brake and adjustable pressure regulator in a standard shift pattern. Crafted from cast iron for strength and durability, this kit replaces aging or worn OE components and provides modern functionality no longer available from the factory.

Designed to deliver race‑ready control, the COA‑12020 includes a dedicated trans‑brake solenoid and valve, high‑pressure spring, and a regulator preset to approximately 225–230 psi that is fully adjustable within a 185–290 psi range, offering fine‑tuned launch capabilities tailored to varying power levels.

Ideal for street/strip and drag‑race applications, this kit enables precise, confident vehicle positioning at the starting line while maintaining reliable forward gear shifts, making it a go‑to solution for rebuilders and performance builders seeking OEM‑quality fitment with enhanced control and durability. Made in the USA since 1976, the COA‑12020 ships complete with gasket kit, solenoid, and installation instructions, offering a turnkey solution for Powerglide enthusiasts.