Rear axle is soaked, need help...

[Chamberpains]

The torque spec on those nuts are huge. Usually 600-900 ft lbs. A 3/4 impact is about the only way to achieve that kind of torque in such a confined area.

Some of that oil looks like it came forward on the brake chambers. You didn't happen to have a greasy 5th wheel and goob of it dropped on the driveline? I get that from time to time.

I would take the other guys suggestion and spray it down and drive it for a bit. Frozen breather is not uncommon.