One problem related to rear axle spindle has been reported for the 2004 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Ford F-150 based on all problems reported for the 2004 F-150.
I purchased a Ford f150 new in January of 2004. At approx 4000 miles the vehicle developed a loud whine in the rear axle. Differential. The dealer replaced the gears in the differential and the whine disappeared. Shortly after, the vehicle developed a vibration that occurred at around 45-55 mph, worse at just over 50. The dealer replaced the entire rear axle assembly but the problem persists. I was told by the service manager that this is a problem with all these trucks and there is no fix. I am very dissatisfied with this truck.