The wheels on the rear truck of the AC4400 do not move. Both the wheels and the axle boxes are not animated to move, which creates a very odd visual of the front truck's wheels spinning but the rear just appear to be dragging, despite the fact that simulation wise, they seem to be fine.
Yeah, I have the same problem but on PS4. I kind of figured this issue had already been posted about.
Yes the dampening struts are also missing from the model, but prototypical issues are really a minority problem at this point.