the cuase of this is ussaully worped rotars
because the alignment is off Warped or out of round brake rotors/drums.
brake rotors out of round
You have a "Warped" brake rotor. It needs to be replaced
you have been cooking with too much shake and brake! lol. Actually,your rotors are likely warped.
you most likely have warped brake rotors
Brake rotors are warped.
Normally this is caused by warped brake rotors.
might have misaligned or loose wheels
Could be a frozen brake caliper or a rotor that is "out of round".
Could be a problem with your torque converter
A faulty power brake vacuum booster could do that.
Your car may shake while braking because the brake rotors are warped or uneven. This makes the brake pads grip unevenly, causing vibration. Other possible reasons: Worn brake pads Unbalanced tires Suspension issues It’s best to check the brakes soon for safety.