During the past snow storm my 4x4 started to sqeek. The sqeek would stop when I shifted back to 2 wheel. I assumed it was a drive shaft u-joint. The noise has not come back since that day and I have been under the truck turning the shaft by hand. I can't find which joint is going dry. My only resolution is to take the whole shaft apart and pull the needle bearing cups off. Now my question is where can I purchase u-joints for this truck that have the good old fashioned zerk fittings on them? Any tips on how the u-joints come apart at the transfer case end? Thanks.