Reply to "De-Railing going into and out of .022 switches"

I'll check the wheel width. But this is happening on too many cars.  Strangely enough, my two LionChief Plus 2.0 ET44AC diesels manage to push or pull the exact same cars through the switches with no problems- even the LIGHT ones, like the tankers.  I'm beginning to suspect the spring tension on the coupler arm?? Maybe there is too much resistance when the arm swings  all the way to the left or right??