One problem related to ball joint has been reported for the 1998 Ford F-150. The most recently reported issues are listed below.
Failure was immediate, Ford f150 fuel tank straps. While driving down the road apparently the tank straps gave way and the fuel tank dropped. Before coming to a stop and after catching some uneven pavement, fuel tank was pealed open and losing about 8 gallons gas. Fire dept was called and they cleaned up spill. Both straps broke and fuel tank is un-repairable. Updated 08/05/11 the consumer stated he experienced other problems with the vehicle, such as a leaking power steering gear box, brake lines had to be replaced, there was a leak in the 4-wheel drive gear box, the muffler hangers, ball joints, tie rod ends and shocks all had to be replaced. Updated 08/11/1.