WHILE IN DRIVE, THE AUTO TRANSMISSION ALLOWED THE CAR TO ROLL BACKWARD AND HIT THE CAR BEHIND ME THEN LUNGED FORWARD AND HIT THE CAR IN FRONT OF ME. THE HILL WAS FAIRLY STEEP AS IT WAS AN OFF RAMP FROM FREEWAY AT STOP LIGHT. CAR HAS BEEN TO DEALER 4 TIMES FOR THIS PROBLEM BUT I AM TOLD IT IS A NORMAL CONDITION. *JS