Product Description
Fits: ZF6HP21, ZF6HP28, ZF6HP34
ZF valve name: SYS.DR-V
- Tooling:
- F-95740-TL69
- VB-FIX
In ZF6HP21/28/34 (Gen. 2) valve bodies, wear is commonly found at different areas in the pressure regulator bore. Wear at the balance end causes high pressure spikes leading to broken drums, pistons or other parts and wear at the spring end of the bore allows low line pressure and lube/TC fluid to exhaust, leading to burnt converter clutches and premature bushing failure. Sonnax oversized pressure regulator valve kit 95740-69K restores valve-to-bore clearances to maintain correct pressures.
- Valve is hardcoat anodized to resist wear
- Sleeve is made from highly wear-resistant aluminum
| 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. |
Notes
Kit is NOT compatible with ZF6HP19/26/32 (Gen.1) units. To differentiate between Gen. 1 and Gen. 2 valve bodies, see ZF Identification Guide.
Warning
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 to verify that the correct OE or replacement part is fit into the appropriate application during rebuild.
Symptoms
- Poor shift quality
- Low line pressure
- Flare shifts
- High line pressure
- Harsh shifts
- Burnt converter
- Delayed Reverse
- No Reverse
- TCC slip
Cause
Pressure regulator bore wear allows fluid loss that causes erratic line pressure and poor drivability.
Correction
Recover pressure control and renew shift quality by reconditioning the bore and installing Sonnax oversized pressure regulator valve kit.
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.
ZF6HP21/28/34 (Gen. 2) Valve Body Layout
