And... well now that I have that issue decided. What should I do to freshen up a rear end? (No puns please

. I've worked intimately with every other part of automobiles except the rear axle. I know it should have new outboard axle bearings and seals so that's in the plan. What else? Should I just check over what I can based on the service manual recommendations? Anything in particular I should look for? Any known weaknesses, wear problems etc? I honestly don't think the rear lube has been changed since I bought the car in 1976. Never leaked a drop (just a weep from the vent now and then), never made any noise other than a tad of backlash "clunk" every so often.
JohnnyB