One problem related to vehicle shudder has been reported for the 1999 Ford F-350. The most recently reported issues are listed below.
Brakes: brakes fade easily and will pull to the left. Brakes also shake and shudder the whole vehicle and surge grabbing and ungrabbing when coming to a stop. The steering wheel vibrates and brake pedal pulsates. Brakes began problem with very few miles never loaded or pulling. Results in unsafe braking. Seat belt: drivers seatbelt hangs down and gets caught in bottom of door. You shut your door, fasten the belt not knowing it is stuck in door. In sudden stops, the belt pulls free with much slack remaining possibly allowing your body to go through windshield. Belt twists very easily, and bottom pivot/anchor turns easily allowing belt to hang down in door. Must fiddle with it each time exiting the vehicle and must double check it is not stuck in door. Transmission: automatic transmission did not disengage in cold weather causing vehicle to stall at intersection nearly causing accident several times. Transmission also shifts in and out of gear while going into overdrive erratically. It will go in and out of overdrive several time withing a second or two causing the vehicle and passengers to jerk back and forth suddenly and unexpectedly.