Symptoms:

  • 2-3 Shift concerns
  • Burnt clutches

Cause:

Wear of the 2-3 accumulator valve and/or sleeve allow loss of torque signal, 2-3 accumulator and/or line pressure.

Correction:

Install the Sonnax valve and sleeve kit that has upgraded materials, restores correct hydraulic clearances and is designed to prevent wear.

4T65-E

2-3 Accumulator Valve Kit
Part No. 84754-53K

Fits GM units only.

You need this if... View Instructions Find a Distributor

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.

  • Sleeve made from highly wear-resistant billet aluminum
  • Valve is hard-coat anodized to prevent wear
  • Late OE size ratio used for increased torque signal influence
  • Can be used in either early or late OE valve bodies
  • Valve
  • Sleeve

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.

GM 4T65-E Valve Body Layout

GM 4T65-E Valve Body Layout
  • 4T65-E 2-3 Accumulator Valve Kit 84754-53K
  • 4T65-E 2-3 Accumulator Valve Kit 84754-53K

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

4T65-E 2-3 Accumulator Valve Kit Vacuum Test Locations