NHTSA Complaint #11427918 — 2016 FORD F-150

I have a critical safety issue with the 2016 F150 truck I bought from Cavalier Ford, Chesapeake VA. The issue is the 6R80 automatic transmission unexpectedly changes gears while driving. In my case the truck down shifted from high gear to low gear on the interstate while driving about 70 miles per hour. I was fortunate no other cars were near me. My truck almost came to a stop, no brake lights displayed. This occurred the week on Jul 6 2021. It has occurred multiple times since than as well. I had the battery checked, showed bad, and bought a new one Jul 9th. I also had the "Check Engine" light scanned at Autozone. It revealed codes P0706/707, ie Range Sensor inside the transmission. I called Cavalier for an appt (Aug 11th almost a month away!!!), informed it would be $140 for a diagnostic!! It was free at Autozone. I also had another free scan done at Logan's Auto repair on Jul 22nd, having codes P0702/705/706/707/1921, all pointing to the Range sensor in the tranny. I spoke with Cavalier representative Nicole on Jul 16th, no help, and also left Service Mgr. Cathy Hunt. a voicemail on Jul 23rd explaining my dilemma. She has not returned my call. My status now, I have a 2016 F150 Ford truck, I urgently need to work and daily errands, ie Grandkids. There was a recall on this issue on the 2011/12 F150s. How come not now, its a major safety issue, and I see a lot of these trucks around. I wanted to convey this to Ms Hunt. Summary...the motor in this truck blew up at approx 39000 miles, and Ford did replace it. Now, at 79000 miles the transmission is also gone out. Since my extended warranty of 75000 just expired, I need some assistance from either Cavalier or the Ford plant. I need a reliable truck for work and taking care of the grandkids. If no one has reached out to me my COB Jul 28th 2021, a safety complaint will be sent in to the National Highway Traffic Safety Administration...Thank you