The recall covers trucks from 2011 to 2013 model years
Ford is recalling more than 220,000 pickup trucks in Canada because the transmissions can suddenly downshift into first gear.
The recall covers F-150 trucks from the 2011 through 2013 model years with six-speed automatic transmissions.
It cover a million-and-a-half trucks, including 1.26 million in the U.S.
The company says a glitch in sending a signal from the transmission speed sensor is the cause.
Ford has five reports of accidents including one that caused a whiplash injury from a sudden downshift.
Owners will be notified by letter starting March 4.
Dealers will update the powertrain control software to fix the problem.
Ford's F-Series pickup is the top-selling vehicle in both Canada and United States.