Just bought my second XJ and have a couple of questions. Bought an '89 Cherokee 4.0 auto 4X4 with 170k for $2500 (overpaid in my mind). Anyways, how can I tell which axles I have (dana 44, 35, chrysler 8.25) and which transfer case (np231 or 242) I have. Also, I often go through creeks that...