If the engine runs forward every time the transformer powers the track there are three possibilities; one, the lock lever protruding from the engine shell has the RU locked in forward; two, the RU is unlocked but not cycling (drum not rotating); three, the engine is wired incorrectly.
If the RU is cycling and the engine runs forward but sits in neutral for the other three steps of the RU then the fingers need to be adjusted. Replacement fingers are too long and must be bent when installed in order to make proper contact with the brass strips on the drum.
