In Ford 5R55S and 5R55W transmissions, 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. Sonnax reverse modular valve kit 56947J-23K restores proper hydraulic function and prevents future wear.

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
Tool kit can also be used for 27741-13K, 56947J-29K, 56947J-56K and 56947J-59K

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