I noticed the other day that my rear end does not seem to be locking like it used to. The last time I remember it working properly was when I was getting on the interstate and I was having trouble getting traction. It was spinning through 2nd and 3rd and then I heard a mild popping noise just as I was beggining to lift. The truck did not act any different or make any weird noises. It has been several thousand miles since. I have not pulled the cover off yet to see what is going on. I was reading today though about some type of tab of pin shearing off to prevent the axle shafts from breaking. I'm not sure if this applies to this axle or not. I am trying to do some homework before I pull the cover off. Any suggestions would be helpful. Also, am I correct by saying that the rear end is in fact an AAM 11.5 rear end with the Eaton G80 locking differential. I could not find anything that said otherwise. One more thing, is this rear end any different than the ones in the 24V Dodge's.