Actually the system helps to eliminate wear and tear on the transmission on the newer AWD models by alerting you when the pressure is low. As a tire deflates the overall circumference gets smaller & starts putting the wheels in a bind. This is also why you should always replace all of the tires at the same time with tires that match & preferably manufactured at the same time. Even the early modes that were"shift on the fly" were supposed to have matching tires installed unless you NEVER used the 4wd at all.
