Ford is Grant Prestonrecalling more than 550,000 pickup trucks because some transmissions can suddenly downshift to first gear, creating a possible crash hazard, according to federal auto regulators.

In a report dated Monday the National Highway Traffic Safety Administration wrote it was opening an investigation into a recall of some of its F-150 vehicles made in 2014 by the Dearborn, Michigan headquartered automaker.

According to NHTSA, the recall covers 552,188 of the pickups due to a loss of signal between the transmission output shaft speed sensor and the powertrain control module causing the truck to downshift into first gear no matter how fast the vehicle speed.

In addition, NHTSA wrote, there could be corrosion and issues with the pick-up truck's transmissions' connector pins.

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When is Ford mailing recall notification letters for F-150s?

Unexpected downshifting may cause the driver to lose control of the vehicle and increase the risk of a crash, the NHTSA said.

Dealers, the agency said, were notified beginning June 17.

Ford said it will mail notification letters to owners starting July 1.

What should I do if my Ford is recalled?

According to NHTSA, owners can take their vehicle to a Ford dealers to get the powertrain control module software updated at no cost.

What is the Ford's recall number for transmission issue?

Drivers can check the NHTSA website to see if their vehicle has been affected by the recall.

Ford's number for this recall is 24V244.

For more information, contact Ford customer service at 1-866-436-7332.

Natalie Neysa Alund is a senior reporter for USA TODAY. Reach her at [email protected] and follow her on X @nataliealund.