AS MY HUSBAND SHIFTED FROM PARK TO REVERSE, OUR NEW JEEP LURCHED OR ACCELERATED SO QUICKLY THAT THE TIRES SQUEALED AND SMOKED. WE AREN'T SURE IF IT "JUMPED" OUT OF PARK OR IF AS IT WENT INTO REVERSE IT WAS ACCELERATED OR FLOORED. I WAS THROWN FROM THE VEHICLE, SEVERE CONCUSSION, DISLOCATED JAW, ETC... MANUFACTURER AND DEALER HAVE INSPECTED AND FIND THE VEHICLE "MECHANICALLY SOUND". WE ARE AFRAID TO DRIVE IT EVER AGAIN.