I got under the rear bumper today (about as far as I can get without lifting the Patriot) and shook whatever components I could reach. The passenger's side rear axle has some play and 'clunked' when I shook it. The driver's side didn't have any play at all. I think there shouldn't be any movement there. Hoping I'm onto something. Will know more in about a week when my friend can get it on his lift.