Harsh Reverse
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2002 Lincoln Navigator, 2002 Ford Expedition, 2001 Lincoln Navigator, 2001 Ford RV Cutaway, and 2001 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
High line pressure, improperly torqued valve body bolts, valve body gaskets damaged, Electronic Pressure Control (EPC) solenoid stuck, stuck low-reverse modulator valve, main regulator/booster valve stuck or damaged, and damaged pump assembly or pump gaskets.