I'm going to mention that at the dealer tomorrow. Thanks. :thumbsupThe front driveshaft spins when your in 2wd also. My guess is its your front driveshaft angle. Even though it may look fine it can make some serious noise. Mine id put it in 4 and back up and it would clank and clunk pretty scary and it would do the same going straight. I had the front driveshaft replaced with one made for the application and its worked perfect ever since.