I have a new bachmann On30 railtruck, but only makes spinning sound and truck goes nowhere. I have read on a few On30 forums that the gears are faulty and split. This truck is new how do I get replacement gears? I have also read that NWSL makes replacement gears, is this true? Would I be better off replacing with bachmann gears or the NWSL gears? Will bachmann even care to send replacement gears?  Thanks, Dave.