Just picked up a Platinum PB Saturday. Love the truck, but on turns, there is a grinding/stuttering/shaking issue. Doesn't matter if road is dry or wet. It's like the truck is jerking as I turn. Not really sure how to explain it, but it surely doesn't feel right and my wife can also feel it. Doesn't matter if 2H or 4A. Will need to call dealer, but any ideas??