MikeB, do you mean remove the selector and take the back cover off it or are you saying take the back cover off the diff? Because my axle housing is solid on the rear(right pic), only way to open black Betty is the front center gear section(left pic). But if you mean the back cover of the selector? then I misunderstood you before when you said that, I thought you meant the diff. I haven't actually inspected the selector to much I did notice its bolted to the center by 3 bolts and the bottom triangle thing.
And I'll try not to over think it. I'm just thinking I have it off if there is anything I need to do to it, now is the time cuz she ain't coming back off till it falls off lol. hints why I just gave it the fresh paint job, and sandblasted ALL the corroded metal off to just fresh pitted metal. The shackles took quite a bit of sand to blast, the axles metal that corroded off to the shackles was on there good!!! That little $40 craigslist sandblaster has come in handy with my old equipment restorations I've been diving into, it makes me feel good to bring crusty and rusty old stuff back to life.