Symptoms:
- 2nd Gear starts
- Low AFL pressure
- 3rd Clutch failure
- 3-4 Concerns
Cause:
Wear at the shift valve spools and bore lands allows loss of critical hydraulic pressure. Typically wear is most severe at the signal A spool/land.Correction:
Ream the valve bore to restore bore geometry and surface finish. Install the Sonnax oversize valve and matched spring.4L60-E, 4L65-E, 4L70-E
Oversized 3-4 Shift Valve Kit
Part No. 77754-42K
-
Tooling:
- F-77754-TL42
- VB-FIX
You need this if... View Instructions Find a Distributor
Wear at the shift valve spools and bore lands causes loss of critical hydraulic pressure which, depending on the wear location and severity, can result in shift timing/feel complaints, 2nd gear starts, 3rd clutch failure, 3-4 shift complaints and loss of AFL pressure.
- Hard-coat anodized aluminum valve resists wear
- New matched spring maintains OE operating pressures and timing
- Valve
- Spring
January 21, 2013
