I have 2 powered A units and 2 dummy B units.
On a slow crawl up to 15(ish) smph the A units trucks fight each other and cause quite a vibration effect. I don't mean in a MU. I mean running the A unit by itself. The lead truck fights the rear truck.
It only started doing this recently. It didn't do it when it was new. Any ideas?
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Check for loose wire or grounding issue..
Rod
Yep I'll check into that. Seems unlikely that both A units would start doing the same thing at the same time. Likelihood of the same wire on 2 different units coming loose at the same time? If it turns out to be true I'm buying a lotto ticket!
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