ZF6HP21/28/34 (Gen. 2) 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. Each layout:
- Displays an exploded view location guide for individual valve trains
- Identifies symptoms and recommended solutions for quality rebuilds
- Provides active links to view specific part details
- Lists any tools/fixtures required for part installation
- Illustrates correct part orientation
With more than 60 layouts to choose from, these convenient, go-to reference guides are valuable resources for any shop.
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Related Units
Related Parts
Required
Recommended
6R100, 6R60, 6R75, 6R80 (2009–2014), 6R80 (2015-Later), ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34
Oversized Converter Release Regulator Valve Kit 95740-05K
OE valve name: WK-V
-
Helps cure:
- Excess TCC slip RPM & related codes
- Harsh TCC apply & release
- Low TCC release pressure
- Rough idle in Reverse
- Harsh downshifts
- Flare shifts
- Overheated converter
Required
Recommended
6F35 (Gen. 1), 6F35 (Gen. 2), 6F35 (Gen. 3), 6R100, 6R140, 6R60, 6R75, 6R80 (2009–2014), 6R80 (2015-Later), 845RE, CFT30, ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34, ZF8HP45, ZF8HP55, ZF8HP70
Accumulator Piston Kit 95740-15K
Required
Recommended
Required
Recommended
ZF6HP21, ZF6HP28, ZF6HP34
Oversized Solenoid Pressure Regulator Valve Kit 95740-64K
ZF valve name: DR.REO-V
-
Helps cure:
- Delayed engagement
- Flare shifts
- Harsh downshifts
- Neutral shifts
- High line pressure
- Harsh upshifts
- Wrong gear starts
- Gear ratio & solenoid codes
- TCC slip
Required
Recommended
ZF6HP21, ZF6HP28, ZF6HP34
Oversized Clutch A & Clutch E Control Valve Kit 95740-72K
Fits either clutch A or E control bore locations in E-shift versions of ZF6HP21/28/34 (Generation 2) valve bodies only.
-
Helps cure:
- Coastdown Neutral
- Downshift bind-ups
- Harsh downshifts
- Flare shifts
- Pressure control out-of-range codes
Required
Recommended
ZF6HP21, ZF6HP28, ZF6HP34
Oversized Pressure Regulator Valve Kit 95740-69K
ZF valve name: SYS.DR-V
-
Helps cure:
- Poor shift quality
- Low line pressure
- Flare shifts
- High line pressure
- Harsh shifts
- Burnt converter
- Delayed Reverse
- No Reverse
- TCC slip
Required
Recommended
ZF6HP21, ZF6HP28, ZF6HP34
Oversized Lubrication Control Valve Kit 95740-71K
ZF valve name: SCHM-V
-
Helps cure:
- Bearing failure
- Bushing failure
- Planetary failure
- Lube failures
- Low converter pressure
- Overheating
- TCC codes & concerns
- Rough idle in Reverse
Required
Recommended
ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34
Oversized Position Valve Kit 95740-75K
Fits E-shift versions only of the ZF6HP21/28/34 (Generation 2) and ZF6HP19/26/32 (Generation 1) valve bodies with an 053 separator plate.
-
Helps cure:
- Shift concerns
- "A" Clutch burned
- B Clutch burned
- E Clutch burned
Required
Recommended
6R100, 6R60, 6R75, 6R80 (2009–2014), 6R80 (2015-Later), ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34
Converter Release Regulator Valve 95740-05A
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