Yep, out of gauge wheelset.I had an FT and a GP 40 that did that, I used a pair of long needle nose pliers to put the wheels back in gauge and no problems since. You need a wheelset gauge to make sure you get it right. LHS will have one...or....try using a piece of good track, like Atlas, it's a jury rig way to do it but it will do till you can get a gauge.