I bought my 06 GTO 3 weeks ago. Since then, I have 4k miles on it. Its alot I know, but I like to drive, lol. Within the past 2 weeks, I've noticed 2 problems. The first problem is that I can hear my back brakes squeeling when going in reverse or at a slow crawling speed. They also squeel when coming to a stop. I notice that it doesnt do it as much if I drive with the traction control off. The second problem is that 3'rd gear seems to be giving me a problem. When accelerating and upshifting, I can shift it fine. Now, when I go to downshift, when going into 3'rd, it seems like it doesnt want to go in and it grinds. Any speed above 30 mph, trying to downshift to 3'rd it does it. So far, with the brakes and the shifting, I'm not sure whats going on. I've also noticed alot of wheel hop when getting into it heavy. I have an appointment at my dealer Wednesday. Any ideas from anyone?