When the rear end is torn out of Lumpy's car, there is no rear end grease or leaking transmission fluid.
At about five minutes, when Eddie and Wally are leaving the dining room and starting up the stairs, the boom mic is briefly visible in the upper left corner of the frame. This was visible on TV, but not DVD, when projected at its original standard definition. The boom mic operator tried to pull the mic out of the frame just as the camera moved away, so it's a genuine goof and not a projectionist error.