I read through the referenced URL. I used the same method to replace the outter axle seal on a dana30, using all-thread and washers. I didn't do the socket thing which just didn't spring into my head when I did the seal, but I'll sure use that when I get into replacing a seal again in the near term future.
What I was wondering about though was if he was replacing the passenger's side axle with the one piece axle. I gather he wasn't though as it was put together with the 2-piece vacuum disco axle.
I read some place, but can't recall where now that you can replace the two-piece axle with a one piece axle. However the axle seal would then be installed in the axle tube right by where the tube exits into the differential housing. And that's what I thought the URL was refering to by the title. Anyway, any idea of what the axle seal P/N that is used when replacing the two-piece axle with a one piece and placing the seal in the housing tube right by the differential on the passengers side???