The Ford/GM 10 speed trans is a much better transmission. I have had my 2017 Yukon Denali in to a very good dealer twice. They found an obscure computer program and reflashed the computer. It had to go through a whole new learning period. As time went on I'm right back to where I was before. There are times when I make a slow left turn without stopping and slowly accelerate up a short street that has a steep incline. As I feather the throttle up the hill, it slams into first gear so hard our heads hit the headrest. Once, while driving in a busy parking lot, as traffic started moving, the trans shifted unexpectedly into 2nd causing the truck to lurch forward. I could have easily hit the car ahead if I didn't hit the brakes quickly. Also, I often drive on a highway with a 55mph limit and several signal lights. When a signal far ahead turns red I slowly decelerate. As I get to the light the trans drops harshly into first causing me to let off the brake and making the stop real sloppy.