05-19-2010, 09:46 PM
The clearance issue will be where the car jump up. Most like it will be rolling stock with deeper flanges if the problem is a lack of depth for the clearance at places like the frogs or throw bar. The other possibility is that the gauge of the rails may be a little bit tight, or some of the wheels may be too wide causing them to ride up and derail. The other possibility is that the turnout might be twisted or tweaked if it isn't mounted flat.