The problem could affect nearly 1.3 million F-150 trucks. Ford is cooperating with the investigation as the NHTSA determines the scope and severity of the potential issue. No injuries or crashes have been reported in connection with the customer complaints.

Regulators received over 100 consumer complaints about transmission shifting to a lower gear without warning. The investigation affects some Ford F-150s.

Federal safety regulators have launched an investigation into nearly 1.3 million Ford F-150 pickup trucks following reports of uncommanded downshifts that may cause abrupt deceleration and temporary loss of vehicle control.