I AM FILING A FORMAL COMPLAINT REGARDING MY 2019 FORD F250. I EXPERIENCED WHAT IS BEING CALLED THE "DEATH WOBBLE" ON A RECENT TRIP WITH MY TRUCK. WHILE DRIVING ON THE HIGHWAY AT APPROXIMATELY 78 MPH , I HIT A RAISED SECTION OF A CULVERT CROSSING WHICH CAUSED MY STEERING TO BECOME UNSTABLE. THE SHAKING OF THE STEERING WHEEL MADE THE VEHICLE HARD TO CONTROL AND CAUSED US TO HIT THE GUARD RAIL AND CABLE BARRIER. I WAS IN THE LEFT LANE, AND THE BARRIER RUNS ABOUT 3 FEET FROM THE ROADWAY. I HAVE DAMAGE TO THE LEFT SIDE OF MY TRUCK.