There's an interesting topic over on the "main"/ 3 rail forum regarding the remotoring+ -- actually a new frame and drive train, inc trucks -- of the MTH Traxx [ = NJT ALP46, inter alia ] locos by the Swiss company Hermann. Lots of interesting photos; these are 2 rail scale locos. Look for "New Power Drive for MTH Traxx Engine" [ I think it was ]; it may no longer be on the first page.
Best, SZ