Mine does it when I back out of the driveway at about 5 mph with the wheel cut to the right - I have an angled driveway to the street, and it does it when the front wheels get even off the driveway. At first I thought it was rub, but nothing is showing signs of that. I'll probably do SS hoses at some point.
Forgot to mention I am leveled on 35s with stock wheels.