4L60E 4L65E 4L70E 4L60 Servo Release Check Valve Kit Sonnax 77701-076 2nd gear
4L60E 4L65E 4L70E 4L60 Servo Release Check Valve Kit Sonnax 77701-076 2nd gear
4L60E 4L65E 4L70E 4L60 Servo Release Check Valve Kit Sonnax 77701-076 2nd gear
4L60E 4L65E 4L70E 4L60 Servo Release Check Valve Kit Sonnax 77701-076 2nd gear
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  • Load image into Gallery viewer, 4L60E 4L65E 4L70E 4L60 Servo Release Check Valve Kit Sonnax 77701-076 2nd gear
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4L60E 4L65E 4L70E 4L60 Servo Release Check Valve Kit Sonnax 77701-076 2nd gear

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4L60E 4L65E 4L70E 4L60 Servo Release Check Valve Kit Sonnax 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
  • O-Ring
  • Valve

 

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