LGB 2055 WhitePass won't move forward
I'm having an issue with my 2055 White Pass engine. It won't move forward some times. It will drive in reverse without issue. When try to make the engine go forward, the lights come on, but the train moves intermittently. I have another engine 2020 that works fine. I'm thinking that it might be the transformer or the engine itself.
I cleaned the track with sandpaper. The Engine worked great last year. I also replaced the wheels, gears and electrical contacts, brushings, etc when Ibought it in 2009.
Any ideas or suggestions would be great.