Roaring

[randy500]

I have tightened up dozens of loose pinion nuts and then drove them. Its not the best fix but should be fine depending on bearing condition etc.
drive it and see what happens, the bearings are more durable than you think.
Now if your hauling heavy loads or have to have it 100% then rebuild the rear end. If the bearings are bad it would make noise even with the tightened up pinion nut.