OK, I'm not sure how inappropriate this is, but someone that is trying to get ready for a trailride up to North Carolina is having trouble with his driveline. He drives a Passport, but since it's the driveline and he hasn't had much luck with responses I thought I'd link his post here:
Locker?

'89 3.0 4Rnr: Jacob's Electronics, K&N, CF Dual Frict, 4:56 w/ Truetracs, 33 BFG AT/KOs, Cascade Audio, Pro-Comp 4" susp & 2" body (previous owner)

I know, a lot of wasted time and money ... if I knew then what I know now....