Excess wear at clutch A or E control bore allows critical pressure loss that prevents proper clutch action.
The Sonnax oversized valve corrects circuit pressure loss and restores control timing of the clutch control valves.
Flare upshifts or downshift bind-ups are common problems in vehicles equipped with ZF6HP21/28/34 (Generation 2) transmissions. These problems can be accompanied by a coastdown neutral condition or pressure control out-of-range codes. The clutch control valves control clutch apply and release timing, and problems occur when the clutch control valves wear. Sonnax offers the oversized clutch A and clutch E control valve kit 95740-66K (M-shift version) to restore shift timing and vehicle drivability.
Kit is NOT compatible with ZF6HP19/26/32 (Gen.1) units. To differentiate between Gen. 1 and Gen. 2 valve bodies, see ZF Identification Guide.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
January 14, 2014
Topics: Identification Guides Transmission Ford ZF ZF6HP19 Transmission ZF6HP26 Transmission ZF6HP32 Transmission ZF6HP21 Transmission ZF6HP28 Transmission ZF6HP34 Transmission 6R80 Transmission 6R60 TransmissionRead Now
December 21, 2012
Topics: Vacuum Testing Vacuum Test Guides Transmission ZF ZF6HP21 Transmission ZF6HP28 Transmission ZF6HP34 TransmissionRead Now
Contact a Sonnax Parts Distributor.
Vacuum tests at the ports indicated fail to hold the recommended minimum in-Hg.