I have heard a lot of Rubicon owners talk of this problem. Just had a friend get his whole axle replaced by warranty, from this problem, same year model too. I am not sure if people are leaving the front lockers on all the time, or what. It is not a good idea to use them, unless you need them, and try to only use them while driving a straight line. Either that, or pay extra for the beefed up alloy's, like superior, or the other one, can't remember it. I followed a 12 page thread on the Rubicon Owners Forum about this problem. I think it has to do with people thinking that Rubicons, are indestructible, just my hunch. You can break anything if you try hard enough. As they say, don't replace it when it breaks, beef it up. Go with stronger components, they make them.