I haven't had any luck on the web trying to find out how the 2 step reverse unit works on this engine. Does anyone have a helpful link or can explain. Also, the engine runs smooth and dandy in reverse but wobbles side to side in forward. I'm pretty sure the tender could use more weight and I suspect the driver tires may need replaced. They are mounted on the driver wheels, but seem lose in comparison to how my O-gauge tires fit. I haven't removed the drivers and they look to be quartered, so that shouldn't be an issue. I can try adding a brass spacer to the front side of the armature to see if that helps. The motor does not overheat. The engine just seem to fight itself in forward.
Rich