I have a 2055 that runs nice for the first 10 minutes or so pulling 8-10 cars. It on the same track as another steamer and they run about the same speed.
After 10-15 minutes of them playing tag, the 2055 noticeably slows down so that the other one (2035) catches up easily and has to wait at the designated track area. This is a relatively new problem, within the last 6 months or so.
The 2055 does not seem to have any additional friction when I test it by hand after it slows down.
Any thoughts of what I should look for when I tear it down? or before tearing it down?