Symptoms:

  • Inconsistent shift quality

Cause:

Valves, springs and pressurized fluid repeatedly push on the end plugs, causing the plugs to deform and wear. As a result, critical pressure is lost due to excessive clearance between the plug and bore.

Correction:

The Sonnax O-ringed end plugs restore correct circuit pressures. The O-ring provides additional sealing to reduce pressure losses past the end plug.

ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34

O-Ringed Internal End Plug Kit
Part No. 95740-30K

You need this if... View Instructions Find a Distributor

Valves, springs and pressurized fluid repeatedly push on end plugs causing them to deform and wear. As a result, critical pressure is lost due to excessive clearance between the plug and bore. Sonnax O-ringed internal end plug kit 95740-30K services the seven individual bores in the ZF6HP19/26/32 (Gen. 1) with 053 separator plate code, and ZF6HP21/28/34 (Gen. 2) valve bodies which use internal end plugs to isolate valves from solenoids. The double O-ringed end plugs replace damaged OE end plugs and restore pressure containment to the valve bore.

  • Prevents loss of critical pressure
  • Requires no machining or special tools
  • Services all seven bores to isolate valve from solenoids with 12mm internal end plugs

Kit is compatible with all ZF6HP21/28/34 (Gen. 2) units, and only ZF6HP19/26/32 (Gen. 1) units that have a 053 separator plate code. To differentiate between Gen. 1 and Gen. 2 valve bodies, see ZF Identification Guide.

  • End Plugs (7) 12mm dia.
  • O-Rings (20) 6 extra

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.

ZF6HP21/28/34 (Gen. 2) Valve Body Layout

ZF6HP21/28/34 (Gen. 2) Valve Body Layout

ZF6HP19/26/32 (Gen. 1) with 053 Separator Plate Valve Body Layout

ZF6HP19/26/32 (Gen. 1) with 053 Separator Plate Valve Body Layout
  • ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34 O-Ringed Internal End Plug Kit 95740-30K
  • ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34 O-Ringed Internal End Plug Kit 95740-30K

You need this if...

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

Note: Port configurations may change due to variations of casting channels between M and E shift, as well as make and model. The location that needs checking will be the port with the retaining clip.

ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34 O-Ringed Internal End Plug Kit Vacuum Test Locations