No Forward & No Reverse

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.