Symptoms:
- Pin bore wear
- No 4th
- Burnt band (GM)
- 2-3 Bind-up
- 3-4 Clutch failure
Cause:
Severe case wear at the servo pin bore due to side-loading and high use.Correction:
Restore proper hydraulic clearance by reconditioning the case bore and installing Sonnax servo pin kit.4L60, 4L60-E, 4L65-E, 4L70-E
Oversized Servo Pin Kit
Part No. 77787-03K
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Tooling:
- 77787-RM3
You need this if... View Instructions Find a Distributor
Sonnax oversized servo pin kit 77787-03K is for use in reconditioned GM 4L60, 4L60-E, 4L65-E and 4L70-E case bores. Matching the longest OE pin length, this chromoly steel servo pin is durable enough for high performance applications as well as stock replacement.
- Included stiffer 4th apply spring eliminates unwanted band drag in 3rd Gear
- Added O-ring improves sealing between the pin and 2nd Gear servo
- Servo pin is fully compatible with OE and aftermarket servos
- Servo Pin
- Spring Green
- O-Ring
