In Ford 5R55S and 5R55W units, 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.