My wife said she always wanted a train under her X-mas tree. So I got out my dads 1957 Lionel 1581 train set. It has a #611 diesle sswitcher (blue and orange jersey central). After cleaning the track, contacts train wheels and lubing everything I have noticed this. The train seems to make a lot of noise going forward and can not pull many cars. When I press the terminal on the transformer to go in reverse it seems to be much quieter and have much more power. Any ideas? i would love to have it pull all of the cars but it just will not going forward. Thank you all for taking the time to review my introductary posting. Love the site.