WHILE THE VEHICLE WAS IN REVERSE THE VEHICLE SUDDENLY ACCELERATED FORWARD AND JUMPED THE PARKING BARRIER. THE VEHICLE THEN WENT DOWN AN EMBANKMENT AND ONLY STOPPED AFTER HITTING A WOODEN PILING. *AK *NM THE DEALER REPLACED THE TRANSMISSION BECAUSE IT WAS SLIPPING. AFTER THE TRANSMISSION WAS REPLACED THE CONSUMER NOTICED THAT THE VEHICLE WOULD DRIFT BACKWARDS WHILE ON AN INCLINE. THE DEALER INDICATED THAT THE TRANSMISSION WAS OPERATING AS DESIGNED. *NM