This is our 2nd time reporting this back 4 years ago our vehicle downshifted suddenly. Causing our vehicle to drop speed tremendously. We called the dealership to let them know what happened and they said they have had several complaints at the time of these trucks doing this. It caused the rear tires to lock and slide. We ended up loosing control and running of the road and wrecking the truck and messing up the front. FORD HAS STILL NOT FIXED THIS VEHICLE