Transmission Parts Ford ZF Valve Body Valve / Sleeve

Symptoms:

5-4 Flare
5-4 Neutral
No 4-5
VFS 1/A solenoid control code
Delayed Forward
Harsh Forward

Cause:

The OE boost valve and sleeve seizes or becomes damaged. The OE boost sleeve is made of plastic, which can easily be cracked or broken when the sleeve is being removed from the valve body

Correction:

Sonnax replacement boost sleeve is made of wear-resistant aluminum to increase durability. The drop-in boost valve is designed to maintain OE pressures when used with the OE clutch A control valve.

6R100, 6R60, 6R75, 6R80 (2009–2014), 6R80 (2015-Later), ZF6HP19, ZF6HP26, ZF6HP32

Clutch A Control Boost Valve Kit
Part No. 95740-21K

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ZF6HP19/26/32 (Gen. 1) and Ford 6R60, 6R75, 6R80, 6R100 transmissions are equipped with a plastic sleeve for the clutch A control boost valve. This material is prone to damage, especially during removal. Failure of this sleeve results in delayed or harsh Forward engagement, flare 5-4 downshifts and no 4-5 upshift. The Sonnax clutch A control boost valve and sleeve kit 95740-21K will restore the 4-5 downshift function, correct the missing 4-5 upshift as well as correct Forward engagement problems. The Sonnax boost valve kit can also be used to replace an OE boost assembly that was damaged during disassembly and must be used with the OE clutch A control valve.

Hardcoat anodized aluminum valve combats premature wear
Aluminum boost sleeve is highly wear resistant to increase life
Direct replacement boost assembly works in the OE bore, with the OE clutch control valve, to maintain OE system pressures
No special tools required
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

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.