Hello all. I recently (last Wednesday) purchased a silver '04 Crossfire 6-speed coupe with 48,000 miles on it. I am the second owner and the 70,000 mile/7 year power-train warranty still applies. I love my car so thats why I was disturbed when I got out on the beltway and once I got into 6th gear going over 50 mph a high pitched humming noise started emitting from the back of the car! One of the wheel wells possibly though not sure? Any ideas? Brand new tires by the way (contis). Thanks!