One problem related to clutch has been reported for the 1999 Ford F-150. The most recently reported issues are listed below.
Was going 65mph when the steering got real stiff. Was hard to turn. Had come to a stop. Unable to turn steering to turn wheels. Master clutch slave cylinder had very little resistance on the clutch when the pedal was pressed. When the vehicle is cold it can happen. Vehicle is very difficult to shift into another gear. Will be taking vehicle to dealer.