Transmission Parts ZF ZF6HP19 ZF6HP26 ZF6HP32 Valve Body Valve / Sleeve

Symptoms:

Broken parts due to excessive line pressure
Erratic line pressure
Harsh shifts
High line pressure
Restricted converter/lube flow
Soft shifts
Flare shifts
TCC slip

Cause:

Excess pressure regulator bore/sleeve wear allows fluid loss and/or causes valve hang-up, preventing normal line pressure control.

Correction:

Restore appropriate line pressure in all ranges by reconditioning the bore and installing Sonnax oversized pressure regulator valve kit.

Warning:

Verify OE valve & sleeve measurements before use.

There are some small diameter and length differences that can cause fit and pressure issues if mismatched into the wrong application. It is recommended to measure the locations shown here to verify that the correct OE or replacement part is fit into the appropriate application during rebuild.

Application	A	B	C	D	E	F	G
ZF6 Gen. 1, 6R60, 6R75, 6R80 ('09–'14)	.645"	.629" Dia.	.495" Dia.	.568"	.378"	.629" Dia.	.550" Dia.
ZF6 Gen. 1 w/ 053 Separator Plate	.725"	.657" Dia.	.511" Dia.	.649"	.378"	.657" Dia.	.586" Dia.
ZF6 Gen. 2	.804"	.629" Dia.	.511" Dia.	.725"	.418"	.629" Dia.	.562" Dia.
6R80 ('15-Later), 6R100	.645"	.629" Dia.	.511" Dia.	.568"	.378"	.629" Dia.	.550" Dia.

ZF6HP19, ZF6HP26, ZF6HP32

Oversized Pressure Regulator Valve Kit
Part No. 95740-78K

Fits units with 053 separator plate only.
OE valve name: SYS.DR-V

Tooling:

F-95740-TL78
VB-FIX

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

Vehicles equipped with ZF6HP19/21/32 (Gen. 1) transmissions often develop erratic or high line pressure due to excessive wear in the OE pressure regulator bore and/or sleeve. This wear allows critical oil loss, preventing proper line pressure regulation. Without correct oil pressure, the PR valve will be out of its desired position, resulting in line pressure instability and possibly restricting cooler and lube flow. Reconditioning the bore and installing Sonnax oversized pressure regulator valve kit 95740-78K renews pressure regulator action for revived line pressure control in all ranges.

Hardcoat anodized aluminum valve combats premature wear
Sleeve manufactured from highly wear-resistant aluminum

Note

Kit is NOT compatible with ZF6HP21/28/34 (Gen.2) units. To differentiate between Gen. 1 and Gen. 2 valve bodies, see ZF Identification Guide.

Contents

Valve
Sleeve

Valve Body Layout

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.

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

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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

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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. Valve must be positioned as shown to obtain an accurate vacuum test. A 6mm Allen socket and a screwdriver works well for this procedure. Screwdriver pushes sleeve outboard while the Allen socket positions the valve inboard. Vacuum test plate corner will fit snugly between screwdriver and socket to test outer port.