u need a clush sleeve, bearnings on the gear carrier, bearnings on the axles, some gear shims (maybe),gear oil, posi trac oil. some gear paint to check gear wear.
You'll also need some special tools to do the job correctly. A mag base and dial indicator to check backlash, a inch/pound torque wrench to check pinion bearing preload, bearing pullers and drivers, and a hefty breaker bar to tighten the pinion nut.
Are you doing this yourself?
If you are, don't take this the wrong way, but if you have to ask what you need to do it, you shouldn't be doing it.
Rears are one area that needs to be left to experts.
If you don't get the tolerances right, your rear will eat itself, and damage hundreds of dollars in parts. This is why even some of the best home mechanics, pay people to do gears.
I just did mine never had a rear end apart, besides having the axles out. Just take your time, everyone else already said what you would need. Got all my parts from arts parts over on corral, good prices and shipped quickly highly recommend him.
But if this is kinda your first big job working on a car, then it might be a good idea to bring it to a shop now that I am thinking about it.