ZF6HP21/28/34 (Gen. 2) transmissions are equipped with an aluminum sleeve for the clutch A and E control boost valve. This material is prone to wear from valve plunger reciprocation. Failure of this sleeve results in a variety of shift problems and solenoid codes. The Sonnax clutch A and E control boost valve kit 95740-28K will restore the correct hydraulic clearance and proper function of the assembly.

Hardcoat anodized aluminum valve combats premature wear
Sleeve is highly wear-resistant to increase service life
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

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