@StevefromPA if your two rectifiers have MagneTraction it might have been added after purchase by a service station, or it's an uncatalogued feature. In my experience NONE of the MPC-era rectifiers had MagneTraction as an original feature.
Sometimes the rubber tires themselves are the cause of the wobble. In other cases, it's the zamac (non-ferrous) wheels that have casting seams, or are drilled off-center that are responsible for the "wobble." A Postwar power truck 2028-100 is the definitive cure: MagneTraction and no wobble! Throw in a matching postwar armature, set the thrust play, add a couple ounces of ballast to the fuel tank, and you've got a great running train!
