I was driving along as about 45 mph today when I felt a little "tug" in the forward motion and then a "tick tick tick" sound that sounded like it was coming from the front driver's side. I started to slow down as it sounded like it was getting worse but couldn't tell with the window up. Then a short grinding noise followed by a huge clunk/bang where it felt like someone crammed on the brakes. It was in AWD (2004 LS). I put it in 2wd and it seems to work fine. I went onto a little dirt road and tried in AWD and 4WD and it makes a terrible noise but I didn't go over 5mph. I switch it back to 2WD and it still makes the noise unless I stop and back up....then it drives fine. Hub assembly, CV joint, Front Dif??????? Any input is appreciated. I am getting ready to tear into it.