Volvo 740GLE AND 960TURBO BRAKE SYSTEM

I AM HAVING VOLVO 740GLE AND 960 TURBO WHICH IS HAVING A BRAKE SYSTEM PROBLEM, IN WHICH WHEN EVER YOU APPLY THE BRAKE IT WILL BOUNCE AND AFFECT THE STEERING WHEEL.
THIS IS THE THIRD TIME OF ASKIN THIS QUESTION
LET ME KNOW THE SOLUTION TO THESE CARS BRAKE SYSTEM BOUNCING AND AFFECTING THE STEERING.
THANKS FORUM