WHEN STARTING THE VEHICLE AND SHIFTING FROM PARK TO DRIVE THE TRANSMISSION DID NOT FEEL LIKE IT ENGAGED. AFTER NOT ENGAGING THE VEHICLE WAS PUT IN PARK AND SHIFTED INTO DRIVE AGAIN. THE TRANSMISSION STILL DID NOT FEEL LIKE IT ENGAGED. NOT BEING SURE I STARTED TO APPLY THE GAS WITH NO FORWARD MOVEMENT. SUDDENLY WHEN THE RPM'S REACHED ABOUT 1500-2000 RPM'S THE VEHICLE ENGAGED INTO DRIVE CAUSING MY VEHICLE TO HIT THE PARKED CAR IN FRONT OF IT. ONLY MINOR DAMAGE WAS DONE SINCE THE VEHICLE TO THE FRONT WAS FAR ENOUGH AWAY AND I WAS ABLE TO STOP JUST SOON ENOUGH TO ONLY TAP THE FORWARD VEHICLE. SINCE THE VEHICLE WAS NEW THERE HAVE BEEN LOUD BANGING NOISES COMING FROM THE REAR WHILE STOPPING,AFTER STOPPING AND RELEASING THE BRAKE OR WITHOUT THE AIR CONDITIONING, WHILE STOPPED AND THE RPM'S FALL BELOW 500 RPM'S. THE BANG SOUNDS AS IF THERE IS TENSION BEING RELEASED SOMEWHERE CAUSING THE VEHICLE TO "LURCH FORWARD". SHIFTING THE GEAR SELECTOR (FROM PARK TO DRIVE AND PARK TO REVERSE ETC) IS ALSO CREATING A LOUD BANG AND VERY ROUGH SHIFT,WHILE CAUSING THE CAR TO AGAIN SEEM LIKE IT WANTS TO "TAKE OFF". TO DATE THE DEALER EITHER SAYS HE CAN NOT DUPLICATE OR WHAT HE DOES HEAR IS NORMAL.