NHTSA Complaint #11717696 — 2021 FORD F-150

When the truck is put into reverse especially when cold the transmission does not initially go into gear. When it finally does the vehicle lurches rearward violently and I have to slam on the brakes to not hit anything. The transmission was just "bench" rebuilt under the Ford powertrain warranty supposedly with a CDF drum and valve body replacement along with software updates including adaptive reset and relearn with the appropriate drive cycles however the vehicle still exhibits this condition. I called Ford customer service and filed a complaint with them last month. They told me to bring to another dealer which the vehicle is currently at and has been for a month. They claim that it is normal for this transmission and refuse to fix it. I have video evidence of the truck being put into reverse and the RPM rising before it slams into reverse. I also demonstrated first thing one morning to a technician after a cold soak overnight and he agreed that the vehicle has a delayed engagement in reverse and when it did finally engage it did so violently. The dealer told me to record it and that would be the best evidence and I did along with presenting it to them. After this they changed their mind and said actually a technician has to witness which I also did. Again they said this wasn't good enough. A field engineer supposedly looked at the vehicle and they wont tell me what he said. Very odd. I feel like im getting the run around and have an unsafe vehicle that Ford refuses and it trying to worm their way out of safetly fixing! In the description below is when the truck can be seen in the video recreating the problem however it has done this countless times.