Well Loki, I hate to say this but with you and Lagen having trouble with his case and you posting it up on here, you might have just saved my Moab trip. My dad just got the cases out and sure enough, the front case shift rod pops the rear case out of gear.
Thanks Loki for posting that thread 
Well Big Mike said it was in the Transfer Case Bible on the website, but they should really put something like that in the sale portion, When i read "Complete Ready-To-Run Reduction unit" No dissasebly assembly of TCase required I think take down the tcase bolt the reduction unit up, and it's "Ready to Run" i know now. Marlin taught Lagen and I a lot in the short 2 hours he was here. I'm glad you learned something from our experience before you took that to the trails with the rails making contact. I'm about to do mine now. i have to do the same thing...this is all you have to do.
Click to enlarge
Cover the counter shavt and coupler bearings with a shop rag (Marlin tucked it behind the snap-rings) to prevent metal shavings from going into the bearings/case and with a high powered cutoff whell, get to crackin. Make sure you shift it into hi. it should be about 1/2" to cut off.
Good luck. I'll post some pics later today, because i'll be doing this.
