You guys seem to have had a much easier time getting your case off than me, which makes me think something is amiss.
I must stress that I already have the rear case separated from the front. I.e., the bolts are off, I nailed it with a plastic hammer, oil (transmission fluid in my case) poured down, and it is now about an inch off of the rest of the case.
I have been following the FSM the whole way, however I did skip removing the sensors on the passenger side. I didn't see this to be necessary. But everything else has been removed -- both rear staked nuts, rear flange, idler shaft lock plate, shift plug with innards, power take off cover, speedometer drive gear, transfer no. 2 case cover, and the power take-off cover, and the shift linkage.
The cover moves freely, it just runs out of room to come off. The top of the cover hits the body before it even remotely clears the gears.