My 98 OBW has been running great for the last couple years so I haven’t been around the forum lately but now I need some help. I just put two new tires on today and the guy at the tire shop cautioned me about transfer case problems with AWD. I have heard about this before but really don’t understand how it works. I broke my left rear wheel speed sensor a while back when replacing the bearing (cast aluminum does not like to be tapped:17. Naturally, my ABS doesn’t work now, but it got me thinking about the AWD. So, three questions (1) Does the AWD system use the wheel speed sensor? (2) Am I doing any damage to my car not having a wheel speed sensor (other than no ABS)? and (3) How does the AWD system work? I tried to search the forum for my answers, but I really wasn’t sure what to search for. Any advice or links are much appreciated. BTW, it is 2.5L automatic.