Lately I have been hearing a squeeking noise coming from the back of my car when I go over bumps, I have stock suspension. I have had the progress rear sway on for a while but it never made noise before. Is it possible with the salt and all from winter that it dried up the bushings? Does anybody have the same problem?? I wanna figure out the problem so I know if I can go to the dealer if it is not the swaybar. I want to fix this before putting my comptech springs on. Thanks