My wife has a 2003 lincoln aviator. When she was coming home tonite she noticed that the rear end is kind of fishtailing a bit. The tires are like new and have a lot of tread left. Recently my son blew out the right front and right rear tires going over a curb at probably 40-50 mph. Besides the flat tires and rims that were replaced could there be something else wrong? It is icy out tonite.