NHTSA Complaint #11593628 — 2021 RAM 2500

When placing the truck in first gear to control speeds on steep declines both on and off road the vehicle's RPMS will climb significantly and the truck will accelerate abruptly under it's own power until it reaches 21-25mph. At which point the RPM's come down and truck begins to slow as expected. Once truck reaches a speed of 11mph the RPM's begin to climb again and the truck accelerates(Not due to gravity, but accelerates under it's own power) aggressively. It will continue to do this pattern until you either reach flat ground or switch gears. Safety is at risk due to uncontrolled descent down steep mountain passes. Constantly having to apply breaks to prevent the truck from going off the road. This safety liability is exacerbated when towing a trailer. I have reported the issue to the dealer multiple times with their claim that the vehicle is behaving as expected. I have not experienced this with any other vehicle. This is not common vehicle behavior. No warning Lamps, Messages or Other symptoms. Reproducible on any hill with steep enough descent.