Hi Donald, thank you for your response. I do have have a long outer loupe with minimum 72 curves. It runs find on that, but there is a Ross double cross over on that route. On the switch straight thru, once and a great while the front wheel right wheel jumps off when going over cross over. On my inter loop with minimum 54 Ross switches it jumps off often. No problem on regular 54 track curves, only on switches. The front axel is definitely defective. See video explaining problem. I talk to Lionel and they sent me a return shipping label for warranty repair. Also the rear coupler sits too low . It sits about half way down when coupled on all my rolling stock cars.😀
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