NHTSA Complaint #10947943 — 2017 RAM 3500

2017 RAM 3500 DUALLY 4X4 68RFE, FIRST TIME TRUCK WAS TAKEN OUT ON THE HIGHWAY OUT OF TOWN WHERE SPEED LIMIT WAS 75. TRUCK HAS A VERY PRONOUNCED SHAKE IN THE REAR. THIS IS FELT IN CAB OF THE TRUCK, BUT NOT THE STEERING WHEEL. PASSENGER SEAT SHAKES BACK AND FORTH. LIKE REAR IS OSCILLATING, AND A DRONING CAN BE HEARD. IT COMES AND GOES IN INTENSITY. HAPPENS ON ALL TYPES OF ROAD SURFACES. RAM FIELD ENGINEER, AND REGIONAL MANAGER SAY IT IS KNOWN ISSUE. TAKEN OTHER TRUCKS OUT WITH VERY MINOR VIBRATION, AND ALSO WITH NO VIBRATION. THIS WAS DONE WITH SERVICE MANAGER TO CONFIRM ISSUE. TIRES HAVE BEEN CHANGED OUT, DRIVE SHAFT CHANGED OUT WITH NO CHANGE. REGIONAL MANAGER SAYS TAKE TRUCK IT IS NORMAL. NO ADDITIONAL REPAIRS WILL BE MADE. TRUCK IS TWO MONTHS OLD AND HAS 1700 MILES AT THIS POINT. GOT TO PULL MY FIFTH WHEEL BUT VERY CONCERNED OF FAILURE ON THE ROAD THAT COULD BE CATASTROPHIC, SINCE UNKNOWN CAUSE IN DRIVELINE. VEHICLE HAD A STAR CASE, WITH NO RESOLUTION TO THE ISSUE.