The night before when I going in reverse it was not moving when the wheels were turned unless I goosed it. When I stepped on the gas a bit it made a slight humming sound and the steering wheel was vibrating slightly. The next day it did it everytime I was turning right or left anything past more than half of the maximum turning radius (does that make sense?). At that point it was whining almost like it would if you had no power steering fluid and vibrating pretty bad. Hope that helps. Dealer said this was not a common issue.
