My '03 GT with the 17" Dunlops was also badly cupping. I noticed it at around 20,000 miles, it was making a loud vibration when coming from high speeds to low speeds and they howled. I took it in and they thought it was a front wheel bearing first, but that didn't fix it. That was when my servi...

Born in 5/02, bought in 4/03 with 200 miles read...I noticed it a couple months after I bought it, and was just a little concerned that it was sitting for so long on a dealer's lot...