[truckster]

UPDATE: So after I cleaned the shift rails and replaced the fluid (75-W90, as per the factory repair manual - OK, I don't know how I misread that one), it was shifting easier, but still making noise. I noticed that the noise was only on deceleration, which made me start looking outside the transfer case. I had dropped the front driveshaft, and thought I might not have gotten the U joint in square, but that wasn't it... Then I noticed scratch marks on the exhaust. I cut 1.5" out of the vertical part of the exhaust and welded it back up, and no more noise. Sometimes it's the stupidest things.