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Sonnax Servo Release Check Valve Kits

4.75 out of 5 stars 4 Customer Reviews

Sonnax servo release check valve kits are unique solutions. Since the GM 4L60 (700-R4) and 4L60-E Series transmissions were introduced, they have had inadequate met

Sonnax servo release check valve kits are unique solutions. Since the GM 4L60 (700-R4) and 4L60-E Series transmissions were introduced, they have had inadequate metering of 2nd gear band servo release oil resulting in 3-4 clutch pack failure. The 3-4 clutch pack and 2nd gear band are just not properly synchronized. Sonnax servo release check valve kits combine an orifice with a ball check valve to resolve these issues and successfully extend the life of 3-4 clutches, and improve the 2-3 shift feel.

Other benefits:

* Provides sufficient exhaust so that 3-2 downshifts are smooth
* Calibrates 3-4 clutch feed orif

Sonnax servo release check valve kits are unique solutions. Since the GM 4L60 (700-R4) and 4L60-E Series transmissions were introduced, they have had inadequate metering of 2nd gear band servo release oil resulting in 3-4 clutch pack failure. The 3-4 clutch pack and 2nd gear band are just not properly synchronized. Sonnax servo release check valve kits combine an orifice with a ball check valve to resolve these issues and successfully extend the life of 3-4 clutches, and improve the 2-3 shift feel.

Other benefits:

* Provides sufficient exhaust so that 3-2 downshifts are smooth
* Calibrates 3-4 clutch feed orifice without creating shift concerns

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Sonnax Servo Release Check Valve Kits 77701-076

Automatic Transmission Rebuild Components, Servo Release Check Valve, GM, 4L60, 4L60E, 4L65E, 4L70E, Kit

Part Number: SOX-77701-076

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

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