1994 F-150, 5.0L, 4X4 engages into reverse or drive very hard, and shifts hard also. After disconnecting and reconnecting the battery, all problems are cured for hours or sometimes days, then, it's back.
No ECU codes are present, however in the early days I did have codes and did change the suspected units, the Throttle Position sensor, and Manual Lever Position sensor. Fluids and filters were changed. I even bought a new (from Ford) ECU.
After cycling the battery connection, transmission performance is 100%.
Any help would be greatly appreciated.