2012 Ford F-150 Platinum, 154000 miles. My truck has the problem of un-commanded transmission gear change to a lower gear. It started a couple of years ago but it took me a while to identify the problem and when it happened. Once, I was traveling at 70mph and, all by itself, it downshifted into 1st gear. The truck lurched and made a loud bang. It also caused a minor control problem due to the change is gears at that speed. I took it to my local Ford dealer and they replaced the shift motor in the transfer case (at my expense), maybe in Nov 2024. It worked fine after that until my recent road trip, Mar 2025. The un-commanded shift happened again three times during my trip to GA from PA. I’m taking it back to Ford tomorrow. When this shift happens, there is a bang followed by a sudden slowing of the vehicle. It’s somewhat scary to have the truck act in this manner.