[bigred5765]

well we have only managed to get through 2 diff outputs in the last 18 months or so we've had it since just before release.as long as its built right its fine and works a treat,the locking grub screw IMHO works better than a nut it never ever comes loose,no matter which side its on,and if the diff balls are falling through the diff that would mean you haven't filled the holes with diff grease as per manual,