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

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

Find a Distributor

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
  • 4L60, 4L60-E, 4L65-E, 4L70-E 2nd Gear "Corvette" Ratio Servo Kit 77701-04K