REVERSE PISTON .850 (6 CLUTCH STANDARD BRAKE / PRO-BRAKE)

The Coan Racing COA‑12843C Reverse Piston (.850″, 6‑Clutch Standard Brake / Pro‑Brake) is a precision-engineered hydraulic component designed for GM Powerglide transmissions outfitted with a six‑plate reverse brake pack. At .850", this piston delivers optimal hydraulic sealing and engagement force tailored for both standard and Pro‑Brake applications, ensuring consistent reverse operation under a variety of driving conditions.

Meticulously machined to exact specifications, the COA‑12843C provides reliable pressure application and fluid sealing within performance and rebuilding contexts, making it a durable and trusted upgrade in precision reverse gear assemblies.