Well I would think that would do more harm than good. There is a lip thing around the inside part of the gear box. I'm sure you could wiggle the rear portion out, but you might screw that lip part up. You would have to raise up the gear box at least 3-4mm for the rectangle part to come up. Not to mention the outdrives would prevent this from happening.
This is all in my head though, everytime I service my diffs I take the entire rear off and break it down.