If it isn't, and being you will be in it as deep as you are, install a limited slip diff.
Im doing this to my 9.25" this summer. You might as well replace the axle side bearings and seals while you're in there.I have a 2004 QC 4x4, 3.7l with a 5 spd and a 3.55 geared 8.25" rear axle that must be rebuilt due to horrid pinion bearing grindage. I'm all but absolutely certain I'll need a new ring and pinion along with the master bearing kit. Is there anything else that I will need to replace?