One problem related to axle shaft seal has been reported for the 1999 Ford F-250. The most recently reported issues are listed below.
Problems with brake equipment/ vehicle shook violently when brakes were applied. The vehicle had been to the dealer five times, and each time the consumer was informed the problem was resolved. After the second repair, the warranty had expired so the consumer had to pay for the repairs. Finally, the consumer took the vehicle to his personal mechanic who stated the problems the vehicle experienced was caused by a front seal leakage on the right axle. In addition, the mechanic stated when the grease leaked onto the rotor, it became hot and warped the rotor which caused the vibration. Consumer wanted new rotors, calipers, and seals on both front wheels at no cost to him. He also wanted to be reimbursed for the three out of pocket repairs.