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

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

.74 Ratio

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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 upgraded Viton® D-rings in place of the OE seal rings for improved sealing during apply and release.

  • Upgrade used for high performance or heavy-duty towing applications
  • Improved D-ring sealing configuration
  • Compatible with Sonnax 4th Gear super hold dual servo kit 77767K.
  • 4L60, 4L60-E, 4L65-E, 4L70-E 2nd Gear "Corvette" Ratio Servo Kit 77701-04K