I bought an 06 GT in June. At 4.5K I had to have the ring/pinion replaced. The rear end is making the same noise again. Now at 7K the ABS/traction contol light goes on for 3 days. Of course the light goes off when I take it to the dealer. I got the auto (big mistake) and the car hesitates, almost stalls occasionally. Any suggestions on what's wrong with the rearend or traction control? I've lost all faith in the car. Who should I contact to see if they'll buy it back?