Today i started up my truck after going over to a buddys, and when i took off from a stop sign making a turn i feel a clunking coming from the rear end. At first it was not so bad, but i came to another stop sign and as i took off it started clunking really bad again. It seems as if it is worse when turning. I figure its either a u joint or the ring slipping. After i heard it clunk worse i returned to my friends and left it. Haven't taken any further diagnostics because it was dark, but i figured i would get a few opinions to help me out. Thanks!