THE VEHICLE WILL NOT STAY ENGAGED IN PARK. THIS IS THE THIRD TIME THIS HAS BEEN REPAIRED. HOWEVER, THIS TIME IT ROLLED BACKWARDS INTO SOMEONE ELSE'S VEHICLE. OUR VEHICLE WAS IN PARK AT THE TOP OF THE DRIVEWAY FOR NEARLY 2 HOURS BEFORE THE PERSON PARKED BEHIND OR VEHICLE. THEY WHERE AT OUR HOUSE FOR ABOUT AN HOUR, WHEN THEY WHERE LEAVING WE NOTICED THAT OUR VEHICLE HAD DISENGAGED FROM PARK AND ROLLED 15' DOWN THE DRIVEWAY INTO THEIR VEHICLE. THANKFULLY, THERE WERE ONLY A FEW SCRATCHES ON EITHER VEHICLE. OUR DRIVEWAY IS FAIRLY FLAT, IT HAS A 1-3 DEGREE SLOPE TO IT. LEADING TO THE CONCLUSION, THAT THERE IS NOT A LARGE INCLINE THAT THE VEHICLE WAS NOT FORCED OUT OF PARK. THERE HAS TO BE SOMETHING WRONG WITH THE WAY THE TRANSMISSION IS ENGAGED INTO PARK OR THERE IS YET ANOTHER PROBLEM WITH THE SHIFT LINKAGE. THE SHIFT LINKAGE WAS ADJUSTED THE FIRST TIME THIS HAPPENED. THE SECOND TIME THE SHIFT LINKAGE WAS REPLACED. WE ARE TAKING IT BACK TO THE DEALER TODAY TO SEE WHAT THEY FEEL NEEDS REPLACED THIS TIME.