Sonnax 2^nd gear super hold servo kit 77911-03K for GM 4L60 (700-R4), 4L60-E, 4L65-E and 4L70-E transmissions delivers 18% more apply area than the “Corvette” servo (largest OE). It's the perfect choice for performance applications when a larger-than-OE servo is desired, and its unique design avoids the timing flaws and excessive shock loads found in other aftermarket servos. Combine this servo kit with Sonnax 4^th gear servo 77767K for unmatched holding power and shift performance that's an easy in-vehicle install.

• 18% More apply area than OE "Corvette" servo
• Maximizes holding power in 2nd gear with more positive 1-2 and 2-3 shifts
• Upgraded dual Viton^® seals ensure positive band apply/release and eliminate cross leaks
• Chromoly steel apply pin is longer than longest OE pin and features added seals to reduce leakage of 3rd gear pressure
• Servo and piston made from durable billet aluminum