What 24 owners told NHTSA about the 2020 Ford F-450 Sd

The contact owns a 2020 Ford F-450. The contact stated while driving 70 MPH, the vehicle vibrated and the vehicle briefly lost motive power. The vehicle returned to normal functionality once the accelerator pedal was depressed. The vehicle was taken to the dealer, who diagnosed a failure with the power train control module (PCM). The vehicle was repaired, but the failure reoccurred. The vehicle was taken to another dealer, who diagnosed that cylinder #4 had failed, and there was a misfire in cylinders #3 and #5. The vehicle was not repaired due to the cost. The manufacturer was notified of the failure but informed the contact that the VIN was not under recall for the failure. A case was opened with the manufacturer. The failure mileage was approximately 87,000.

NHTSA ODI 11638026

Sudden acceleration while braking. While towing a gooseneck trailer aprox. 25,000 lbs, with the truck in tow/haul mode and the exhaust/engine brake turned on, started down a long winding 8% grade, could feel the engine brake working as normal, holding the truck from gaining speed, as the truck entered the second turn, the truck lunged forward gaining a lot of speed causing me to quickly stab the brakes, the truck continued this type of on/off cycle with quickly acclerating while standing on the brakes to try and control it until I leaned over and swithched the engine brake off, making it necassary to ride the brakes down the grade to maintain a safe speed and not lose control. By the time we reached the bottom, smoke was coming from both the truck and trailer brakes and the stopping power was nearly gone. The truck has done this intermittently without warning and is a major concern for safety. A search on truck forums show a number of people with the same concern. Dealer has been able to reproduce the problem, but does not have a solution. I beleive its a defect in the new 10 speed transmission and tied to the ongoing vibration / shake / hop / bounce we are experiancing.

NHTSA ODI 11471521