Tool Required VB-FIX Required

Printpartsummary
Symptoms:
  • Coastdown Neutral
  • Flare shifts & bind-ups
  • Harsh downshifts
  • Pressure control out-of-range codes
Cause:

Excess wear at clutch A or E control bore allows critical pressure loss that prevents proper clutch action.

Correction:

The Sonnax oversized valve corrects circuit pressure loss and restores control timing of the clutch control valves.

Tool Required VB-FIX Required

ZF6HP21, ZF6HP28, ZF6HP34

Oversized Clutch A & Clutch E Control Valve Kit

Part No.

95740-66K

Oversized Clutch A  & Clutch E Control  Valve Kit
  • 95740-66k_combo

  • Oversized Clutch A  & Clutch E Control  Valve Kit

Small_95740-66k_combo Small_95740-66k

ZF6HP21, ZF6HP28, ZF6HP34

Oversized Clutch A & Clutch E Control Valve Kit

Part No. 95740-66K

  • Clutch Control Valve
  • Boost Valve
  • Boost Sleeve
  • O-Ringed End Plug
  • O-Rings (2) 1 Extra

This kit will fit in either clutch A or E control bore locations in M-shift versions of ZF6HP21/28/34 (Generation 2) valve bodies only. For E-shift versions, Sonnax offers 95740-72K.

Complaint:

  • Coastdown Neutral
  • Flare shifts & bind-ups
  • Harsh downshifts
  • Pressure control out-of-range codes

Cause:

Excess wear at clutch A or E control bore allows critical pressure loss that prevents proper clutch action.


Correction:

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.

  • Valves are hardcoat anodized to reduce wear
  • Sleeve is made from highly wear-resistant aluminum
  • O-ringed end plug for better sealing

NOTE:

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.

Required Tools

Related Parts

You need this if...

Vacuum tests at the ports indicated fail to hold the recommended minimum in-Hg.

  • Test Locations

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Valve Body Layouts

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.

Valve Body Layout ZF6HP21/28/34 (Generation 2)
Contact a Sonnax Distributor to purchase this part.