While driving at 55-60mph, a rattling (sounds like something is spinning or loose) starts happening. It doesnt happen often, just every once in awhile. I need to fully stop in order to get the noise to stop. Also when I stop, it sounds like something disengages. I was thinking maybe my 4WD is screwing up or something along those lines. Any help is appreciated. I dont want to take it to the dealer since I cannot make it happen, it just does it on it own. Thanks in advance.

 

And what is this truck? Fraid we can't see it through the Internet.

 

The user name is 330 cid 05f150, maybe that's what they are referring to. I don't know why they don't fill in their truck info so we know what in the hell they are talking about.
It's not that hard to do.

 

5.4