There is no AWD problems with the system itself. There is a TSB for leaking PTO (transfer case) so you might want to see if it is leaking by simply removing the plastic pan under the front of the car and looking for drips on the PTO or stains in the pan. Now the mounts for the rear diff is a whole different issue. You really need to upgrade them asap as the stock ones just plain suck. Any spirited driving and you can end up with a broken diff or axle.