Brake Sensor problems of the 2020 Lincoln Aviator

My vehicle has 4960 miles and the transmission started to slow down as if I was driving a stick shift car, then 2 or 3 days later began to kick and lose power when increasing speed after a stop sign. Dealer diagnosed an internal failure on the transmission and it needs to be replaced. A couple of times in the morning after starting the vehicle, when putting the reverse gear I had my foot on the brake but the car still moved and the brakes were very stiff, I had to release the brake and apply it again in order to stop the car from moving. The sensors on the rear brake support are extremely sensitive. The car detects a small crack on my driveway and stops abruptly causing my head to bump twice on the headrest, the dealer said it was normal, no defect found. The windshield fluid I thought it was normal in this car to throw a very small amount of liquid compared to my other Lincoln mkz, but reading the complaints from other customers I realized that it's not normal.