AFTER STOPPING ABOUT 4 OR 5 TIMES HAD NO VACCUM ASSIST ON THE BRAKES, CAUSING DRIVER TO REAR END ANOTHER VEHICLE AND DAMAGING THE FRONT BUMPER. THE DEALER WAS AWARE OF THE PROBLEM, AND STATED THAT A LARGER VACUUM TANK COULD BE INSTALLED TO CORRECT PROLBEM AT OWNER'S EXPENSE. *AK