To help control the 3rd clutch apply pressure and shift feel, a 2-3 accumulator piston and an accumulator valve and sleeve that regulate fluid pressure are used. The 2-3 accumulator valve and sleeve regulate line pressure using torque signal influence and direct 2-3 accumulator pressure to the spring side of the piston, controlling the 3rd clutch apply. Wear at the sleeve or valve can allow torque signal, 2-3 accumulator or line pressures to exhaust, resulting in various 2-3 shift complaints. Some early OE valves were not anodized, and are prone to significant wear and scratching.
The Sonnax 2-3 accumulator valve kit 84754-53K is made to the late OE size ratio for increased torque signal influence, and can be used in early valve bodies as well. Upgraded materials and design have been incorporated to prevent wear.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
March 21, 2013
Topics: Vacuum Test Guides Vacuum Testing Transmission GM 4T65-E TransmissionRead Now
Contact a Sonnax Parts Distributor.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.