marky350 wrote:
HI I HAVE A HIGH PITCH NOISE COMING FROM BEHIND THE DASH BOARD WHEN I PRESS
THE BRAKE PEDAL, ONLY WHEN I DRIVE THE CAR HARD CAN ANY ONE HELP IT IS
DRIVING ME NUTS

Check the vacuum hose to the brake servo- it will run from the vacuum
pump (right hand end of engine as you stand looking at the car) to the
servo (near the fluid resevoir).