OUR SEQUOIA HAS STARTED 'LUNGING' FORWARD UPON INCIDENTS OF HEAVY BRAKING; FOR INSTANCE, WHEN WE BRAKE HARD AND COME TO A COMPLETE STOP, WHEN THE PRESSURE IS RELIEVED FROM THE BRAKE PEDAL, THE VEHICLE LUNGES FORWARD HARD- IT PUTS OUR HEADS INTO THE HEADRESTS AND FEELS LIKE WE HAVE BEEN HIT FROM BEHIND; THIS IS BOTH A SAFETY ISSUE AND A LIABILITY ISSUE AS THIS CAN CAUSE AN ACCIDENT WHEN BRAKING HARD; IT'S NOT A THROTTLE ISSUE OR A BRAKE ISSUE, BUT FEELS MORE SO LIKE THE POWERTRAIN IS SLIPPING OR JUMPING BACK INTO GEAR VERY HARD. OUR SEQUOIA HAS APPROXIMATELY 65-66,000 MILES; I HAVE ALSO CONTACTED TOYOTA REGARDING THIS PROBLEM AND HAVE NOT YET RECEIVED A RESPONSE. AS I REVIEW THE INTERNET, OTHER SEQUOIA OWNERS HAVE HAD THIS PROBLEM AS WELL.