Product Description
TOOLING REQUIRED
- F-84754-TL55
To help control the 4th clutch apply pressure and shift feel, a 3-4 accumulator piston and an accumulator valve regulating fluid pressure are used in GM 4T65-E units. The 3-4 accumulator valve regulates line pressure using torque signal influence and directs 3-4 accumulator pressure to the spring side of the piston, controlling the 4th clutch apply. Wear at the bore or valve can allow torque signal, 3-4 accumulator or line pressures to exhaust, resulting in various 3-4 shift complaints.
Reconditioning the bore and installing Sonnax oversized 3-4 accumulator valve kit 84754-55K restores correct hydraulic clearance and shift control in GM units. For Volvo units, Sonnax offers 84754-58K .
- Hardcoat anodized valve combats premature wear
- Lengthened valve spool for better hydraulic sealing and stability
- Annular grooves hydraulically center the valve to reduce wear
CONTENTS
- Valve
- Spring
SYMPTOMS
- 3-4 Concerns
- Soft shifts & poor line rise
CAUSE
Wear at the 3-4 accumulator valve and/or bore, allowing loss of torque signal, 3-4 accumulator and/or line pressure.
CORRECTION
Recondition the worn bore and install the Sonnax oversized 3-4 accumulator valve kit to restore correct hydraulic clearances and shift control.
