REVERSE PISTON 1.035 (5 CLUTCH PRO-BRAKE)

The Coan Racing COA‑12843A Reverse Piston is a precision-engineered component tailored for high-performance GM Powerglide transmissions using a five‑clutch Pro‑Brake setup. At 1.035″, this piston is crafted to deliver increased hydraulic clamping force, enabling firmer and more positive reverse gear engagement compared to standard pistons. Designed to exact dimensions, the COA‑12843A fits seamlessly within Pro‑Brake reverse drums and operates reliably under elevated fluid pressure and thermal stress.

Ideal for builders refining performance or drag-focused Powerglide transmissions, this piston enhances clutch retention and reverse engagement consistency, making it a valuable upgrade for race-ready or high-torque applications.