8-3/4 Pinion Nut Torque???

I can't think of anything that makes the noise you describe, except maybe the dust deflector on the yoke, ( the saucer shaped thing behind the u-joint) if out of position can cause a scuffing sound, rubbing on the case, at driveshaft speed.
If I had done the job, I would like to know about, diagnose, and have the opportunity to remedy the issue.