Jack up rear end so both wheels are off the ground, place jack stands under rear, take off wheels, take off drum, wipe brake dust in eyes and hair, there is an odd hole in the axle flange, this is used to acces the 5 nuts that hold the axle in, sometimes after the nuts are taken off, the axle is hard to get out, I have a slide hammer that hooks to the studs for this. The one side has an adjuster on it that has a washerwith a tab on it that fits in the adjuster groove, if the axles have little to no endplay, then you dont need to mess with it, just put it back together the way it was. If there is evidence the axle seals leak, now is the time to change them, I use the ends of the axles to pop them out of the tubes, works good, then take the nuts off that hold the gears in. Since most of the nuts have been beate along with the studs, the threads will come right out of the nuts, so a tap will be needed to clean the studs threads and new nuts will need to be purchased. if your nuts have a thick coat of grease on them they might have been spared, but 9 times out of ten the lower nuts all lose their threads. They are 3/8 fine thread nuts too, fyi
clean out all the crap and do the opposite to put it all back together.