I have six thousand miles on my F350 4x4. I was getting A strange wacking sound from the left rear tire. I thought that I had picked up a nail or I had a stone inside the hub cover. I popped the hub cover and found all the lug bolts loose. They say you should check the lug nut tension on the styled aluminum wheels periodically. Probably a good Idea. Give me plain steel wheels anytime.

RonL