JCJC
I agree with Mrshorty on the hubs, I should've read the post more carefully. My neighbor who works in parts at a Ford dealer mentioned that there is a nylon or plastic part in the hub that is prone to fail. Sorry, I don't know more about it, but apparantly it's common. I haven't faced that issue yet.

I'm working on a consolidation of the 13 page info on the transfer case. I'll finish it and send it to you anyway, but it might take a few days...I type slow.