Aparently I am not driving my truck right. the only thing I have broken so far is a 47t spur gear. and that was because I was driving it on the ice and it went all crazy slipping around and the grabbed a little snow, then the clutch bell stud started coming loose and the clutch gears started hopping against the 47t. It was fun driving on the ice though. There have been a few diff cup ideas as far as what to replace. I have also been told that replacing the dogbones with CVDs has fixed the problem. Are you breaking both body mounts at the bulkhead or just one or the other? I have one screw out of my rear mount that I have never replaced, maybe that would help some. And my front posts are pretty loose so they can just fold over against the bulkhead or forward over the diff. I am not sure beyond that, what would work to correct it. Back to the cage though. even with a starter box you can run with no body. It doesn't look as cool, but it would prevent the body posts from breaking, and it would also cut down on the number of bodies you may break.