NHTSA Complaint #11690940 — 2021 FORD F-150

The contact owns a 2021 Ford F-150. The contact stated while driving at various speeds, the vehicle made an abnormal clunking sound. The vehicle was taken to the dealer to be diagnosed, but the cause of the failure could not be determined. The contact stated that the failure progressively worsened. The contact stated that the vehicle made an abnormal grinding sound and jolted erratically while driving, and upon coming to a stop. The dealer diagnosed that the transmission had failed and needed to be replaced. The dealer replaced the transmission; however, the failure recurred. The vehicle was taken back to the dealer, where it was diagnosed that the transmission, the catalytic converter, and other unknown parts had failed and needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 150.