Ford recalls more than 550,000 F-150 pickups over faulty transmission

Ford is recalling more than 550,000 pickup trucks in the U.S. because the transmissions can unexpectedly downshift to first gear no matter how fast the trucks are going. 

The recall covers certain F-150 pickups from the 2014 model year. Ford's F-Series pickups are the top-selling vehicles in the U.S.

Ford says in documents postedTuesday by U.S. safety regulators that the downshifting can cause drivers to lose control of the trucks, increasing the risk of a crash.