I have a Lionel 2026 which has had the armature and brushes cleaned. The E unit has had new fingers and drum roll replaced. All the wires and connections on the e unit are in great condition.
However the same problem to be discussed existed before all this work was done.
If the switch is placed in the far right position facing the front of engine, the engine goes in reverse and quickly reverses and goes in the forward position. This continue back and forth until the engine overheats and then stops. If the engine is stopped and is going in reverse, and the switch is moved to the far left, the engine goes in reverse, the same situation exists if the the engine is stopped and it is going in the forward position with switch in far left position, the engine goes forward. when placed in the neutral middle position, the engine continues to move in the last position determined from direction last directed from switch in the right position. It does not go into neutral.
I am a little stuck, anyone with ideas. Is it the switch or the e coil?