So today we got a new 2021 F-250 Lariat Tremor. No miles, fresh out of the factory. We had the local dealership deliver it, and the guy who delivered it to us said he had no problems what so ever when driving from the dealership to where we were (30 minute drive). After we took delivery, it sat for maybe 10 minutes, then we drove it home. The instant we turned out of the parking lot, the truck went from 1st gear to 7th gear, and thats where it stayed, the whole time. When we first turned the truck on after taking delivery, this message below popped up and it quickly went away, then the engine light came on and it stayed on. We drove it home and it really struggled to gain speed after stopping because it wouldn't shift down. After we finally made it home (7 minute drive) we parked it, turned it off and let it sit for about and hour. We went back out, turned it on and it was in 1st gear but the engine light on. Now this was only a few hours ago from when I'm making this so we haven't done anything yet, and the dealership is clueless. Any help is greatly appreciated, thanks!