Four problems related to differential unit have been reported for the 1999 Ford F-350. The most recently reported issues are listed below.
Transfer case shifting fork wore out. Truck had only been in four wheel drive about a dozen times all in snow conditions on major hiways. No offroading at all. Had to replace the shifting fork, a planetary gear an a imput shaft. This was the only way Ford would sell the repacement parts. Ford has made a design change on the shifting fork.
We feel this truck is a lemon and we want someone to be responsible for what we have gone through with this truck, we have had nothing but trouble with it, it is unreliable. No safety defect listed.
The rear ends keep locking or binding up.
No summary.