Two problems related to steering wheel vibrate have been reported for the 2008 Ford F-250. The most recently reported issues are listed below.
2008 f250 6,4 powerstroke 4x4 drive above 55 and hit rolling bump and the front end starts shaking violently steering wheel also shakes. I have had everything inspected and everything is tight as a vehicle with only 59,000 mile should be. The more I drive it the worse it gets its starting to just shake randomly without hitting a bump.
Began in 2010. . . Death wobble. . . . Hitting a bump,,steering wheel shakes violently. . . . . Loss of confidence in the ability of the vehicle to provide safe transportation. . . . . Dealership visit was not helpful. . . Said it was tire pressure. . . Added a different trac bar in 2012. . . Helped some but til produces the wobble at lower speeds.