Re: Drive shaft play?
I'd have to disagree. Play is normal in locked vehicles. However, if you're getting up to 3/4 of a driveshaft rotation, this is not normal at all. An inch, maybe two would be acceptable.
I just wouldn't know whether to tell you to go into the diff or the tcase first. I'd probably look at the tcase first as that kind of rotation coming from your transfer case indicates something is messed up in there.
The diff would need to be addressed too. Check your backlash.