Hey guys... I had the same problem. It took me forever to figure out what it was but I finally found it and it was the control arm bushing. I have a 98gt and it was the control arm on the drivers side and the brushing towards the front of the car. After a million times of taking my tire of I finally noticed a shiny spot on the control arm where it had been rubbing against the mount. Took a few hours to change the control arm and I haven't had a problem since.