800 rear end issues

Is there a known problem with the outlander 800 rear end? My rear diff has gone out twice so far this year. Went out earlier this year got it back and didn’t even have 10 hours on it before it was going out again. They said the tolerance is off which is why it’s going out. So now I’m considering trading for a 850 XMR. What do you guys think about trading for the XMR? Good move?