The Blue Oval will have to fix 944 vehicles in the U.S. due to an error in the inspection process that may have introduced loose bolts into the transmission. The majority of vehicles involved in this action have not been sold, though a small number are in customers’ hands who will be promptly notified.

According to an advanced notice posted online, vehicles equipped with Ford’s 10-speed automatic transmission may contain extra, loose bolts that were introduced during the quality review period of the inspection process.

The document states that a loose bolts in the transmission could get in the way of the parking pawl, preventing the transmission from shifting into park, and increasing the risk that the vehicle will roll away unintentionally, which is a safety concern.

Read: Ford Recalls Almost 350,000 Vehicles Because They Could Roll Away

 Ford Halts Sales Of Certain Broncos, Mustangs, F-150s, And More Over Transmission Issue

A Ford spokesperson confirmed to Carscoops that the document is legit, adding that the automaker believes that just three percent of the vehicles identified will present this issue. They added that more than 600 of the 944 vehicles affected are unsold.

The National Highway Traffic Safety Administration (NHTSA) is expected to publish more documents relating to this defect in the coming days, including a possible recall for the 300 or so vehicles that were delivered to customers.

The problem affects models with Ford’s 10-speed automatic transmission, including F-150s built in Dearborn between November 9, 2022, and January 13, 2023, and in Kansas City between November 18, 2022, and January 12, 2023; Mustangs built at its Flat Rock assembly plant between December 1, 2022, and January 5, 2023; Explorers built in Chicago between November 13, 2022, and January 27, 2023, and in Hangzhou between December 9 and 26, 2022; Broncos built in Michigan between November 14, 2022, and January 12, 2023; and, finally, Lincoln Aviators built in Chicago between November 15, 2022, and January 27, 2023.

 Ford Halts Sales Of Certain Broncos, Mustangs, F-150s, And More Over Transmission Issue