Lately the rear of my Outlook has been feeling loose. It tracks around in the differences in the surface of roads. It has been so bad at time my wife has felt it while riding with me and thinking it was icy. Now, all struts, shocks, and springs were replaced about 15k miles ago but it rode very well after that repair. For the last 5k miles or so it just feels like something is loose. I've taken it back to the dealer twice for them to check it but they say they couldn't find anything. I had them check the alignment (was done at time of strut/shock replacement) because I noticed inner tire wear. They said it was within specs. I am in need of new tires soon but don't want to get new ones just to have them chewed up from something wrong with the car. Anyone have any ideas????