One day as I was turning it felt like the wheel was going to fall off. Ilook under the VX and see the cv boot is torn. I thought the joint was bad,but it showed no signs (clacking on turns) before this instance. So Iwas looking for a half axle.That was the the 4-6 weeks part. Don't need that as it turns out, I need a speed sensor in the transfer case and a boot. When the speed sensor is acting up it makes your differential act weird.That's why there was a weird kind of jerking. There are several threads on this subject. I told the dealer to read up on this site.I believe alot of times the sensor just needs to be cleaned. Those times for parts are all factory.I did look around the net and still found nothing. We can still find parts it just going to be a hassle.