Link in the first post is broken.  

I found it here:

http://www.ultimatesubaru.org/forum/topic/47583-rear-disc-conversion-on-ea81-ea82s/

Very nice work. thank you for sharing this. I wish to grease my rear bearings. Could i simply lower the back diff and pop the axles out?

Great write up.

 

Another way to make the tool for removing the inside "nut" is to get some flat pieces of metal & weld them to a longer piece. If you notice, the grooves line up across each side (I've lost mine so I'll need to get a picture). Then you can use the longer piece as the lever to break through the folded over lip.

 

Also, I never notice any mention of folding back over into the groove on the inside so the nut doesn't undo itself. Might not be a problem in areas where you get lots of rust problems underneath, but in dry areas like here with dirt roads in the country, those things will undo themselves no problem...