NHTSA Complaint #11717225 — 2023 FORD F-250 SD

I was on an overpass in the left hand lane doing 40-45mpg getting ready to make a left hand turn on an expressway on ramp. I coasted for just a bit and applied the brakes gently, then a little more. The truck was not slowing down like it should have so I applied alot more brake pedal pressure and it slowed down some then it down shifted several times and the engine was roaring, I'm guessing around 3K rpms or more and pulling me forwards. I put as much pressure as I could on the brake pedal and got it down to 4-5 mph and then as it was almost at a stop, still with the motor roaring, I slammed it into park and turned the key off. The motor turned off thank goodness. I sat there for about 20 seconds or so, luckily no one was behind me, then I turned it on again and it was idling just fine. I crept through the intersection and proceeded down the on ramp at 10mph or so and pulled over. Turned it off again and called the wife and a few friends about it. It ran ok, albeit I was super cautious, to my destination 25 minutes on down the highway. Something freaked out big time in the computer. Had there been traffic or someone in front of me it would have lead to a serious crash.