rear end?

Anyone change their rear differential (rear axle)? I popped the cover off the "pumpkin" and drained the fluid out and two gears are sheared. Most of the metal stuck to the magnet on the inside of the cover but the damage is done! I was hoping to get some tips from someone who has done this. I'm changing the springs and rear shocks while I have everything out.

Yes- I blew mine out-at 340,000 got a salvage yard entire rear axle assembly for $150 and replaced the whole thing- was a lot easier than I expected..