I WAS DRIVING APPROXIMATELY 56 MILES PER HOUR ON A HIGHWAY WHEN I EXPERIENCED A HORRIBLE WOBBLE OF THE FRONT END OF THE TRUCK. I IMMEDIATELY STOPPED AND TOOK IT TO THE NEAREST DEALER WHO TOLD ME THAT THEY DID NOT KNOW WHAT COULD HAVE CAUSED THIS. THEY REPLACED ALMOST ALL COMPONENTS IN THE FRONT END OF THE TRUCK INCLUDING THE TRACK BAR, STABILIZER, BEARINGS, AND ALL ASSOCIATED BUSHINGS. SEVERAL DAYS LATER I WAS DRIVING ON A DIFFERENT ROAD AROUND 60 MILES PER HOUR AND EXPERIENCED THE SAME ISSUE.