8-3/4 Pinion Nut Torque???

inertia said

You have got to be sure which diff you got.
If it DOES not have a crush sleeve, and uses shims, it would not be unusual to see a shimmed pinion run in with an impact, then some may do a final torque.
If it DOES have a crush sleeve, that could be started with impact, then final tighten with torque wrench.
The original shop may not have been incorrect dependant on the diff.
You may just have a bad bearing all along

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Hey,

It am pretty sure it is the 742.

I don't know if it has a crush sleeve but he said it did. Several times. It is a fresh rebuild. I got 400 ft from home and heard a sound like two swords running against each other without the "ing" if you know what I mean. The schhhhh without the ing.

I took it back, drove it 40 miles back with no noise. He impacted the old yoke off and lightly impacted the 1350 on to measure for the drive shaft, then impacted the new one on.

It makes noise at 30 mph when there's no acceleration or deceleration. As soon as I give it a touch of gas it stops. It made the noise 5 times on the way home.

Please advise.