Interesting, Ray. I'm paying attention- my seals are OK so far, but I figure it's only a matter of time before I'll be doing the same thing.
In the service manual, they call it the "final case assembly" which is made of an inner and an outer section (14 & 15)- the outer section has the wheel housing on it. That's also where the seal is located.
The manual shows all sorts of stuff, but NOTHING about how to separate the inner & outer final case- they just show them separated, and another shot of the seal being pulled.
Looks like the final case assembly comes off with only the 4 bolts you can see, so that looks easy enough. Perhaps there's a snap-ring inside the wheel housing that has to come off to allow separation... have you found anything?
Please keep us posted as to how you make out!