I'm a new 04 6.0 guy and the truck is a very clean stock suspension truck with 150 k miles. The steering is fine at low rpm's but above 2000 rpm it gets progressively harder to steer almost to the point of locking up.. As soon as you let off the throttle its easy to steer again. If you rev it up in park it sticks but if you depress the brake pedal you can feel it bump the brake pedal when the wheel is turned but it turns easier. It's had a new pump put on it with no change. Its pretty dangerous when you get on it.