January 14, 2014
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:
Sonnax drop-in 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
Kit is compatible with all ZF6HP21/28/34 (Gen. 2) units, and only ZF6HP19/26/32 (Gen. 1) units with 053 separator plate.
You need this if... View Instructions Find a DistributorValves, 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
- Drop-in Zip Valve™ parts install quickly and easily
To differentiate between Gen. 1 and Gen. 2 valve bodies, see ZF Identification Guide.
- End Plugs (7) 12mm
- 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
ZF6HP19/26/32 (Gen. 1) with 053 Separator Plate Valve Body Layout
March 23, 2016
Six Ways from Sunday: Diagnosing ZF6 & Ford 6R60/80 TC-Related Drivability Concerns
Bob Warnke
December 21, 2012
ZF6HP21/28/34 (Gen. 2) Vacuum Test Guide
June 22, 2016
ZF6HP19/26/32 (Gen. 1) with 053 Separator Plate Vacuum Test Guide
October 08, 2020
How to Identify Similar Ford & ZF6 Transmissions — Four Features to Check Before You Begin a Rebuild
Maura Stafford
You need this if...
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.
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.
