OVERSIZE SOLENOID PRESSURE REG VALVE KIT
# 99790K

Oversize Solenoid Pressure Regulator Valve Kit 6R60, 6R75* Reamer Required

OVERSIZE SOLENOID PRESSURE REG VALVE KIT

ZF valve name: DR.REO-V. Tool Required.

Symptoms:

  • Flare shifts
  • Neutral shifts
  • Harsh upshifts
  • Harsh downshifts
  • Gear ratio codes
  • Solenoid performance codes
  • Delayed Forward
  • Delayed Reverse
  • Wrong gear starts
  • TCC slip

Cause:
Excess solenoid pressure regulator valve to bore clearance may cause shift and pressure problems. All the linear solenoids are fed by this regulator valve. Shift quality depends on the amount of wear and often changes with operating temperature.

Correction:
The oversized solenoid pressure regulator valve will control the minimum and maximum pressure source for the solenoid.


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. The Sonnax oversized pressure regulator valve kit restores valve-to-bore clearances to maintain correct pressures.

  • Hard-coat anodized aluminum valve resists wear
  • New matching spring reproduces OE function with the oversized valve

Note:
Kit is NOT compatible with ZF6HP21/28/34 (Gen.2) units. 


Contents:

  • Valve
  • Spring
  • Internal End Plug
  • O-Rings (3)

SONNAX Installation Instructions

Type of Product: Sundry Parts
Qty Needed:
Years:
Alternative #:
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