I have an 08 f250. Ive had her for about 5 years and shes been great. Recently however my steering has taken a turn for the worse. When i go around a corner faster than 10mph the truck wants to stay turning. Even after manually returning to center the steering wheel kicks and fights to go back to turning. Ive replaced ball joints, u joints, tie rod ends, and the steering damper. No luck. I do have larger tires 295 70 r17, ive had it aligned twice. Im leaning toward steering gear box, just because i cant think of anything else. If anyone has any insight or ideas id really appreciate it.