No Forward & No 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.
Fluid level, internal or external shift linkage, low line pressure, pump inlet filter or seal assembly damaged, manual valve, valve body leakage (improperly torqued bolts), damaged or stuck solenoids due to contamination, pump assembly (main regulator/booster valve), center support assembly damaged or support bolts loose or damaged, forward/reverse sun gear, forward planet assembly, input shaft splines damaged, center shaft, output shaft, overdrive carrier assembly, overdrive overrunning clutch (shift selector in OD with OD switch in cancel mode) and torque converter damaged.