with every thing said above
i use a greese gun with a greese needle in it to get inbetween the rollers good
after you do the left side might want to go ahead and re-pack the right side as well with the left axle out
installe the left side with the right side out
back the adjuster off some and install the right side
run adjuster in to set endplay...done
if its not had a oil change and is low might think about draining it while both axle are out
just back the 10 bolts off to the ends of the studs and pry the chunk out some and dump the fluid or drop it out and clean the housing out with a rag
after its drained,clean flange/chunk with some brake clean and use some rtv on the gasket flange and pop it back in then axle and endplay(I use thin coat of rtv on the lower 1/2 of the flange were the oil sits myself)
easy-er said than done no doubt,but thats why most ginny 8 3/4 have slopy end play and 30 yr old oil in them,not the fastest/ez-est to service
good luck