Sonnax 84571-01K Extended Length Forward Band Servo Pin Kit for GM 4T60-E 4T65-E

The Sonnax 84571-01K is an extended length forward band servo pin kit designed to replace the OE forward servo band pin in GM 4T60-E and 4T65-E transmissions to optimize forward band apply. This kit addresses critical issues found in these transmission models including case wear at the forward band servo pin bore and the inadequate length of the OE pin.

Key Features:

• Approximately 0.200" longer than OE pin, reducing typical servo pin stroke by half to help take up extra band clearance
• Includes servo pin and four PTFE seals plus two extras for enhanced durability
• Incorporates two sealing rings to prevent leakage past the servo pin, compensating for case bore wear
• Made from steel for reliable performance

Solves Common Problems:

• Prevents forward band slipping caused by case wear and short OE pin design
• Reduces risk of broken forward band caused by excessive pin throw
• Speeds up engagement into Drive by reducing servo travel distance for full band application

This performance upgrade kit is essential for rebuilders addressing forward band issues in GM 4T60-E and 4T65-E automatic transmissions commonly found in Buick, Chevrolet, Pontiac, Oldsmobile, and Cadillac vehicles.