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  • Low line rise
  • Soft shifts
  • Delayed Reverse


Severe wear of the boost sleeve due to continuous valve oscillation allows EPC and Reverse boost oil leakage.


Install Sonnax O-ringed valve and sleeve to restore hydraulic integrity.

4R100, E4OD

Boost Valve Kit
Part No. 36424-01K

O-Ring Style

You need this if... View Instructions

Vehicles with Ford E4OD and 4R100 transmissions frequently have problems with poor line rise and/or soft shifts. These complaints are often caused by severe wear of the pressure regulator boost sleeve, allowing EPC and Reverse boost oil leakage. Sonnax boost valve kit 36424-01K eliminates these problems.

  • O-Rings provide additional protection against leakage at the sleeve bore
  • Sleeve manufactured from highly wear-resistant aluminum alloy
  • Hardcoat anodized aluminum valve combats premature wear
  • Valve
  • Sleeve
  • O-Rings (3) 1 Extra
  • 36424 01k combo
  • 36424 01k

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

  • 36424 01k test