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Sonnax Super 2nd Servo

Sonnax Super 2nd Servo

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Quick Overview

SONNAX SUPER SERVO 2ND4L60E 4l70E 700R4 77911-03K


Sonnax super servo kit for GM 4L60/4L60-E has 18% more apply area than the “Corvette” servo (largest OE) and maximizes holding power in 2nd gear with more positive 1-2 and 2-3 shifts. Dual seals on the 2nd gear piston and separator ensure positive band apply/release and eliminate cross leaks, which contribute to 2-4 band and 3-4 clutch failure. This servo is the perfect option when more holding power is desired without causing excessively harsh upshifts and downshifts. The included apply pin is longer than the longest OE pin, and has added seals to reduce leakage of 3rd and 4th gear oil pressure.

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