I have a 2000 Mercury Sable LS Premium with just under 84,000 miles. I bought the car with 21,330 miles and from day one I've had a problem with my rear suspension system. If I have three passengers in the back it rubs the tires when stopping or pulling out from a stop. Three years ago I had both the rear springs and struts replaced but the problem still exists. Is there anything else can be done to prevent this from happening other than smaller tires.......the tires I have are standard size 16". Any input will be truely appreciated.