my 92 toyota camry shakes or wobbles in the back end, or rear of the car, but mostly on back passenger side, after i get up to 55 mph. i thought i had a bent rim or maybe a bad tire, so i changed both of those and it still does it. when i hit a bump with both back tires, or the level of the road changes, like pulling into a driveway, it also sounds loose or rattly. not sure what is going on.