Last summer at ~ 36K miles, my 08 GT started to "wonder" rather than track straight down the road. After experimenting with different tires, tire pressures, front wheel bearings and such, my dealer installed new ball joints in the front end. It took care of the problem. Now at 55K miles, the problem is starting to return. Again, I've switched tires and no help. I suspect the ball joints are going bad again. Has anyone had this problem?? My dealer says this is unusual and I agree, but it is very noticable and possibly not safe. It really stinks when you try pulling a trailer and this happens. Any input is appreciated.