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