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4L60, 4L60-E, 4L65-E, 4L70-E

2nd Gear "Corvette" Ratio Servo Kit
Part No. 77701-04K

Sonnax 2nd gear "Corvette" ratio servo kit 77701-04K provides increased apply area resulting in improved holding power for firmer 1-2 and 3-4 shifts in 4L60 (700-R4) and 4L60-E transmissions. The servo piston features D-rings in place of the OE seal rings for improved sealing during apply and release. This kit is compatible with Sonnax 4th gear Super Hold dual servo kit 77767K.

  • Upgrade used for high performance or heavy-duty towing applications
  • Improved D-ring sealing configuration
  • Piston
  • Piston D-Rings (2)
  • Housing
  • Housing O-Ring

April 28, 2017

4L60/E Performance & Heavy-Duty Transmission Build Charts

Topics: Rebuilding Tips Transmission GM 4L60-E Transmission 4L60 Transmission 4L70-E Transmission 4L65-E Transmission

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  • 77701 04k