I had a front AGX do that to me on the old 97. Didnt tighten down the nut enough and after a while of sliding up and down through the shock mount the thread had rubbed away. much longer and it would have snapped, I've got some pictures of it at home, but it looks the same. The upper shock mount was destroyed as well, so I replace the front shocks, and all 4 shock mounts with Nopro shock mounts from R*Speed. Rode much better after I replace the shock too. :)