Driving at 5 mph in traffic. Truck suddenly pulls hard right and involved in a glancing blow to a vehicle next to me. Steering wheel then was able to wobble loosely in 3 dimensions with no effect on tire direction. Had turn wheel at least 20 degrees rotation before feeling any engagement: a clunking sound and extremely hard steering with minimal tire response. Truck had to be towed from the accident scene. MANY reports of same problem seen via internet search Several lawsuits noted with various model years. Ford dealer states the steering column parts are obsolete.