I have a 2004 svt cobra and the other day i noticed a problem when reversing, the car tends to like grab with a clunk noise that is sickening. So i drove the car for a little bit trying to get some more symptoms out of it, and well it continued doing this for a few hours. Later that day, i kept driving it, and i kinda said f*** it, if it breaks, it might be easier to track down the problem, so i dropped down into 2nd and punched it, well after shifting into 3rd, midway through the gear i heard a loud pop noise and a continues clunking as rpms rose up. So i stopped on the side of the road and went home, all the way home and now even on jack stands, as you accelerate, and the rpms rise, the clunking becomes more consistent. I AM LOST!! Any input? A buddy of mine told me maybe a U joint, and after driving it too long, it just gave out. So thats all i have as of right now for possibilities!! Please help!