OVERSIZE REVERSE MODULATOR VALVE KIT
# 43794K

Oversize Reverse Modulator Valve Kit 5R55S/W Reamer Required

OVERSIZE REVERSE MODULATOR VALVE KIT

Symptoms:

  • Delayed Reverse
  • No 4th
  • No 5th
  • Direct clutch burned

Cause:
Wear at the reverse modulator valve bore due to constant oscillation allows leakage of variable solenoid feed and direct clutch apply pressure.

Correction:
Refurbish the valve bore and install the Sonnax sleeve, valve and spring to restore proper hydraulic function and prevent future wear.


In Ford 5R55S and 5R55W units, the direct clutch is applied in Reverse, 4th and 5th Gear by the variable force PC-C solenoid. Fluid pressure from the solenoid (VFS3) is routed through the Reverse pressure modulator and reverse engagement valves, which then stroke appropriately to route apply pressure to the direct clutch. Wear at the Reverse pressure modulator valve bore and end plug results in leakage of the solenoid feed and direct clutch apply pressures, resulting in slipping or loss of 4th/5th Gear, burned direct clutches and delayed Reverse engagement.

  • Sleeve manufactured from highly wear-resistant aluminum incorporates the end plug to prevent instability and wear, and provides more sleeve/valve contact for better hydraulic sealing.
  • Anodized aluminum valve incorporates annular grooves to hydraulically center valve and combat premature wear

Contents:

  • Valve
  • Sleeve
  • Spring

SONNAX Installation Instructions

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