Ford will recall 28,579 F-250 and F-350 Super Duty pickup trucks that could suffer a potential break in the passenger side rear axle shaft.
The recall is only for trucks built in May through most of July, the automaker said.
A broken rear axle shaft could result in a loss of power while driving in two-wheel drive, and inability to hold the park function. The vehicle might move unexpectedly if the driver left the parking brake off. That could create a crash.
Ford blamed the defect on “improper material handling during the bar stock cooling process at the axle shaft material supplier.”
Inspectors spotted the problem during production verification testing.
Engineers analyzed the axle shaft and determined it had the incorrect steel composition for Ford’s specifications. Upon investigation, the supplier discovered it used the wrong steel type in a particular batch of axles. The supplier mixed those axles with the correct F-Super Duty axle shafts.
The automaker will notify owners of the recall by mail. Ford will ask owners to take their vehicles to a dealer where technicians will inspect the axle shaft. They will replace any shafts made with the wrong steel grade. Ford will not charge for the service.
Notice of the recall will go out later this month.