One problem related to driveshaft has been reported for the 1999 Ford F-350. The most recently reported issues are listed below.
Cab of the truck vibrated very hard at any speed. Took to mechanic and they replaced torque converter, then hub, still same problem. Took to Ford, Ford replaced tires, still shaking. Then, they replaced driveshaft, still shook. Dealer did not know what the problem was. Please provide any further information.