Welllllll...
It's easier to drop your transfer case, and then drop your transmission.
But it's impossible! Well, it is, unless you've prepared for it.
First time, you have to drop them as a pair. Once you have, remove the upper shifter housing from the transmission, and separate the transfer case from the transmission. The TOP BOLT is UNDER the shifter housing. DO NOT PUT THIS BOLT BACK IN, when you put them back together! Throw it out! Then, NEXT time you have to do it, you WILL be able to drop the transfer case first, and then the transmission.