One problem related to manual transmission has been reported for the 2003 Ford F-350. The most recently reported issues are listed below.
Clutches, lots of them, when they fail its hard to stop truck, not from abuse failing from defective parts this has been ongoing for a year, Ford wont stand behind it, also have had lots of clutch master cylinders, when this goes there is no stopping, am I the only one having this problem? check online seems like across the board clutch problems at Ford.