NHTSA Complaint #11522316 — 2020 FORD MUSTANG

The transmission takes over when shifting from first gear. This is a automatic 10 speed that when first driven after setting overnight slips out of first and the engine revs on its own (foot removed from gas pedal) to between 4 and 6 thousand then slams into the next gear. This lurches the vehicle ahead and slams the rear pinion. trying to stop the car is difficult when it revs so high then slams into gear. This also happened in a full parking lot and could have lurched into people. I have had it at the ford dealer several times to fix, The first dealer rode with me and replicated the issue. The first dealer reached out to ford engineers and they suggested replacing the valve body in the transmission. (it was worse after the valve body change) The dealer told me they did change the valve body but there is no warranty information showing that. I have been without my car total of 5 weeks so far and they continue to tell me they cant replicate it. I have it on video and it does it almost daily when I drive it. I will not let my spouse drive the car because of this safety issue. This is the same issue that the f150 had in 2020.