Thanks, it's the NP231. In order to pull the driveshaft I need to undo the u-joint at the rear axle, then pull and it will come out of the case, right? Then pull off the conical shaped thing on the back of the xfer case and put it new seal? What fluid should I be using, Dextron 2, Mopar Quadra-Trac?
Also, what would be the danger of driving with tthe fluid low? I won't be doing any wheeling soon so it should be staying in 2wd.