Transmission Parts Ford 4R44E 4R55E 5R44E 5R55E Valve Body Valve / Sleeve

Symptoms:

Delayed Reverse
Burnt Reverse band
Direct clutch burned
No Reverse

Cause:

Debris and constant oscillation of the inner reverse modulator valve can create scratches or wear on the critical valve spools.

Correction:

Restore hydraulic function of the inner reverse modulator valve by installing direct-replacement Sonnax drop-in valve with or without the related Sonnax sleeve, depending upon original failure mode.

4R44E, 4R55E, 5R44E, 5R55E

Inner Reverse Modulator Valve
Part No. 37947-53

OE Size

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Debris and constant oscillation of the inner reverse modulator valve in listed Ford units can create casting bore wear and scratches on the critical valve spools. This allows valuable reverse and/or EPC pressure to leak, resulting in delayed Reverse engagement, no Reverse and a burned reverse band or direct clutch.

Sonnax inner reverse modulator valve 37947-53 is a direct replacement for unworn bores containing valves with noticeable spool scratches. For worn bores containing valves with significant scratches, this direct replacement valve should be used in conjunction with the sleeve in Sonnax kit 37947-11K (reaming required).

Direct replacement valve for use in OE casting
Valve can also be used with sleeve from Sonnax kit 37947-11K
Hardcoat anodized aluminum valve combats premature wear
Drop-in Zip Valve™ installs quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

Note

If bore is unworn, use Sonnax valve to replace damaged or scratched OE valve. If excessive bore wear is detected, use Sonnax valve in conjunction with Sonnax sleeve in 37947-11K. Worn/damaged OE valves used in a sleeve will not optimally restore hydraulic function.

Valve Body Layout

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.