That nut is one so tight, it won't even budge. Are you positive it unscrews from the drive shaft?
Originally Posted by Dave W.
Yes, counterclockwise when standing at the rear of the car facing forward. The nut is screwed onto the driveshaft. If you're facing toward the rear of the car it's clockwise to loosen. Torque is approx 65 and it's a locking nut so it feels tighter. I'd use the right tool, pliers will chew up the nut. Just set the parking brake first so the diff doesn't rotate.