Symptoms:

  • Delayed Reverse
  • Reverse slip
  • Low/Reverse clutch failure
  • Low line pressure in Reverse & manual low

Cause:

Continued movement of the steel valve within the aluminum bore. Lack of optimal valve and linkage stability creates wear and scoring of the manual valve bore, reducing line pressure in reverse and manual low positions.

Correction:

The Sonnax oversized manual valve kit allows the valve bore to be refurbished. The valve has an increased stem diameter at the detent lever and an additional spool for increased stability.
  • 4R100, E4OD Oversized Manual Valve Kit 36947-13K
  • 4R100, E4OD Oversized Manual Valve Kit 36947-13K