WHEN PLACING VEHICLE IN REVERSE AND HOOKING UP A BOAT TRAILER HITCH WITH FOOT DEPRESSED ON THE BRAKE PEDAL, VEHICLE SUDDENLY ACCELERATED, KNOCKING THE BOAT TRAILER 20 FEET BACK. CONSUMER ALSO, REAR WHEELS WERE SPINNING WITH FOOT DEPRESSED ON THE BRAKE PEDAL . CONSUMER HAS CONTACTED THE DEALER, DEALER UNABLE TO DETERMINE THE CAUSE OF THE PROBLEM. PLEASE PROVIDE ANY FURTHER DETAILS. *AK