4th Gear Super Hold Servo Piston

4TH GEAR SUPER HOLD SERVO PISTON (REQUIRES 92845, 92845A, OR EQUIV.)

The COA‑92845B 4th Gear Super Hold Servo Piston is a premium enhancement designed to improve fourth gear band retention in Turbo Hydramatic 700R4 transmissions. This high-performance piston achieves firmer hydraulic engagement compared to standard pistons, delivering more reliable and responsive apply force during gear shifts. Engineered to work in conjunction with the COA‑92845, COA-92845A (or equivalent) 2nd gear servo kit, it seamlessly integrates into existing hydraulic systems and supports consistent fourth gear performance, even under aggressive driving conditions. Machined to Coan Racing's strict tolerances, this piston ensures precise fitment, enhanced band holding capacity, and increased durability, making it an ideal choice for performance enthusiasts seeking to elevate fourth gear control and drivetrain stability.