Being that the pinion gear rubbed, that bearing is shot. personally i would replace both ring and pinion. You do have to shim to set preload on the bearings. On a 12 bolt, you can shim without buying the dial indicators. Just shim until you have the proper gear mesh using paint to see you engagement marks. Also your carrier and axles should be ok. If the pinion gear made any sharp edges in the carrier, just smooth them with a die grinder or file.
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