Symptoms:

  • Code 628, 741, 744
  • TCC cycling
  • Overheating & reduced lube feed
  • Delayed engagement
  • Overheated converter
  • Blued converter
  • TCC surge
  • 4th Slip
  • Coastdown Neutral
  • No 4th

Cause:

Bore wear caused by excessive spring rate and side-loading will result in valve sticking and loss of balance in oil pressure.

Correction:

Sonnax oversized converter regulator valve kit repairs the bore and is an improvement over OE design. The spring and side-load have been reduced and the balance circuit is improved.

4F50N, AX4N, AX4S, AXODE

Oversized Converter Regulator Valve Kit
Part No. 96201-23K

Works in 2- or 4-spooled OE applications


View Instructions Find a Distributor

Constant movement of the converter regulator valve wears the pump body bore in Ford 4F50N, AX4N, AX4S and AXODE transmissions. A worn bore causes high or low converter apply pressures depending on area and extent of wear. The most common is wear at the balance end, causing high converter pressure and internal converter damage. Severe wear in other areas of the bore allows large amount of converter oil to leak to exhaust, lowering converter and converter apply pressure and cooler/lube flow. Sonnax oversized converter regulator valve kit 96201-23K corrects these problems by resizing the pump body bore and restoring circuit integrity.

  • Replaces both the original 4-spooled converter regulator valve and the original 2-spooled version
  • Hardcoat anodized aluminum valve combats premature wear
  • Annular grooves help center the valve in bore to reduce future side-load wear
  • Two replacement springs are included to compensate for the oversized valve, to reduce the excessive spring force that accelerates bore wear and to work with either the original 2- or 4-spooled OE design
  • Either 96201-TL3 or F-96201-TL23 can be used to enlarge the bore to accept the oversized valves, for all applications.

Works in 2- or 4-spooled OE applications.

  • Valve
  • Inner Valve Body Clip
  • White Spring 2-Spool OE Application
  • Black Spring 4-Spool OE Application

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.

Ford AX4N/4F50N Valve Body Layout

Ford AX4N/4F50N Valve Body Layout

Ford AX4S, AXOD, AXODE Valve Body Layout

Ford AX4S, AXOD, AXODE Valve Body Layout
  • 4F50N, AX4N, AX4S, AXODE Oversized Converter Regulator Valve Kit 96201-23K
  • 4F50N, AX4N, AX4S, AXODE Oversized Converter Regulator Valve Kit 96201-23K
  • 4F50N, AX4N, AX4S, AXODE Oversized Converter Regulator Valve Kit 96201-23K