I have a clinging noise coming from the front end of my truck as well. Its only noticable when it is coasting with very little pressure on the fuel pedal or completely coasting at about 60mph, but it doesnt do it as bad with the hubs locked in. I can tell there is a lite vibe at about 55-65 under acceleration too. Ive checked the driveline u-joints myself but couldnt feel or see anything wrong and my truck only has 23000 on it!!!!!