One problem related to steering is loose has been reported for the 2008 Ford F-250. The most recently reported issues are listed below.
Loss of steering control while turning corner. Wheel failed to return to centre without extreme force. Following the corner the vehicle jumped left to right uncontrolled approx 6-12 inches at low speed for 1/2 block. Fighting the wheel I was able to stop, and the steering loosened up allowing me to finish the last 2 blocks of journey at a reduced speed with the steering reacting normally.