If you have the factory posi (Gov Loc,I'm told), then the next sound you will probably be hearing is a loud "thunk!" and the sound of screeching rubber as the rear end locks up. I just had the pin from my posi come loose a couple of weeks ago. Before the locker went out, the rear end had a gear whine coming from it. The guy I bought the truck from said that posi's always make that noise, and I was ignorant enough to believe him. Thank God I was only doin' thirty when that rear end cut loose, or.....Well let's just say I don't want to think about the consequences.
American by birth, Marine by the grace of God