While driving i was coming to a stop approaching a traffic circle. I had to yield the car already in the circle as i was stopping the truck made a clunk and lunged forward while i was breaking forcing me to enter the circle before it was safe to do so. I almost collided with the approaching vehicle with a child in the car. Another instance the vehicle between shifting gears randomly lost power as if it shifted into neutral, then a loud clunk as it finally found the gear when it did the vehicle lunged forward. Another instance with the vehicle in park i started the engine, after the starter finished and the engine turned over there was a loud clunk and the vehicle lunged forward in park enough that the tires made a noise and could have hit a parked car in-front of me. The dealership said it is a known issues with the 10R80 transmission and will cost me $8,000 to $10,000 to repair. This transmission has always clunked and missed gears since i bought it new in 2018 and i have had it looked at multiple times, but the dealerships always said its “normal” Ford knows this is an issues and has not issued a recall and it is very dangerous.