Welcome to AF there boch224
I know what you mean, and I really doubt that a search will show you anything.
I was planning on looking into this subject in the next couple of days if the weather keeps up (colder than he*l here) and do a write up on 4wd troubleshooting.
So if you don't get an answer check this forum in a couple of days.
Sorry that I don't have the answer right now