It will also help to have a one-piece steel t-nut for your diff screw as opposed to some cars that use a plastic T insert for the nut. I don't have an Xray so I'm not sure what it comes with but maybe others could take note of this.
For the balls I usually just put a small dab of lube on each one to prevent too much excess attracting dirt.
And as others have mentioned ceramic balls help a lot and lasts you many rebuilds.
Last edited by rc_square24; 11-14-2010 at 01:58 AM.