4L60E Sonnax 77701-076 4L65E-Servo Release Check Valve 4L60E 4L70E GM Transmission

Medium / ENVELOPE DELIVERY / 500gm-20mm / $7.00

$44.00 inc. GST

5 in stock

SKU 77701-076 Categories ,

4L60 4L65 4L70E
Sonnax Servo Release Check Valve Kit

Part No. 77701-076

2nd Gear Servo Release

Technicians would like to find a way to successfully extend the life of 3-4 clutches, and improve the 2-3 shift feel. They have been trying, with limited success, since the GM 4L60 (700-R4) and 4L60-E series transmissions were introduced. Inadequate metering of 2nd gear band servo release oil causes 3-4 clutch failure. The 3-4 clutch and 2nd gear band are not properly synchronized. Sonnax servo release check valve kit 77701-076 is a unique solution that combines an orifice with a ball check valve to resolve these problems.

  • Improved design meters servo release oil, reducing 3-4 clutch failure
  • Provides sufficient exhaust so that 3-2 downshifts are smooth
  • Calibrates 3-4 clutch feed orifice without creating shift concerns

Additional information

Weight .100 kg
Dimensions 10 × 10 × 1 cm
Manufacturer Part Number

Modified Item

Custom Bundle


Non-Domestic Product

Condition New