I HAVE HAD TWO INCIDENTS INVOLVING Y 2015 JEEP GRAND CHEROKEE WHEREAS I PUT THE GEAR SHIFTER INTO PARK AND BOTH TIMES THE VEHICLE MOVED IN GEAR. THE FIRST INCIDENT I WAS LOADING MY BOAT AND TRAILER INTO LAKE POWELL AND PLACED THE SHIFTER INTO PARK AND THE VEHICLE KEEP ROLLING BACK. THE ONLY THING THAT SAVED ANYONE FROM GETTING HURT WAS I PLACED THE PARKING BRAKE ON IMMEDIATE. THE SECOND INSTANCE WAS I WAS BACKING INTO MY GARAGE WHEN I PLACED THE SHIFTER INTO PARK AND THE VEHICLE KEPT DRIVING BACKWARDS IN REVERSE GEAR. THIS CAUSES MY VEHICLE TO CRASH INTO OVERHEAD STORAGE AND CAUSE APPROXIMATELY $1500 IN DAMAGE TO VEHICLE. I CALLED CHRYSLER AND THEY DID NOTHING TO HELP BUT GAVE ME THE RUN AROUND. I AM CONCERNED WITH MY PERSONAL SAFETY NOW DUE TO THIS ISSUE.