CHECK WHEEL BEARINGS
Sometimes you can have a a pulsation while the brakes are adjusting after you have turned the rotors. You could wait a couple days and see if it corrects itself.
Most of the time, you can get by with just replacing the pads. The rotors generally do not need to be turned if there is no pedal pulsation or vibration. Rotors will need to be replaced if the exceed the minimum thickness which is stamped on the web (area with lug holes).
I don't know if you are saying you have the new hubs and rotors and still have pulsation, or if you are asking what causes pulsation. If you have pulsation on slowing this is due to warped rotors, and you need to change the rotors and the brake pads, not the hubs. Not too expensive: 2 rotors and brake pads for my Pontiac is about 55 bucks. DIY of course.
Frozen brake caliper
form_title=Rotors Replaced form_header=Improve your brake performance with replacement rotors. We will help find you an expert auto technician to install new rotors. What is the year, make and model of your vehicle?=_ Have you noticed any unusual shaking lately when you press on the brakes?= () Yes () No () Not Sure How long has it been since you had your brakes replaced?=_ Have your brakes been squealing or making any noises? = () Yes () No () Not Sure
Warped brake rotors will cause pulsation (or vibrations at high speeds) when the brakes are applied. This may also go on to misalign the calipers and cause other vibration related damages.
if you are driving and you go to stop, then that means that the front rotors are warped. if the front rotors are bad, you will feel a pulsation in pedal while applying brakes. change rotors on front.
Pulsation in brake pedal when stopping? yes and also a shake or shimmy in the steering wheel when brake. your brakes may also chatter
It must be the rear brakes at fault.
Your brake rotors are warped and need replaced/resurfaced.
front brake pulsation have front rotors replaced
They need replaced when they wear out.
Could be that the rotors are "out of round" and need either to be resurfaced or replaced
Rotors out of round and need to be replaced or resurfaced?
Rotors may be out of "round" (lateral runout) and need to be resurfaced or replaced
Warped rotors. They need to be removed, turned or replaced.
New brakes do not grind. If you replaced the brake pads and resurfaced the rotors you may hear a bit of a sound but it is normal until the pads and rotors wear during normal driving.
Your rotors are warped. You need new brake pads and the rotors turned at a machine shop or replaced.
Rotors out of round - need to be re-surfaced or replaced
your brake rotors are warped. You should repalce you brake pads and have the rotors resurfaced if possible, or replaced.
Were the rotors resurfaced or replaced, or just the pads? Warped rotors are the most common cause of vibration when braking
If you feel a pulsation on your brake pedal this most likely is the sign of warped rotors this happens when the brakes get to hot(the rotors will have a buish glassy look in certain spots). I suggest you bring it in to a mechanic to verify the problem. In most cases you can cut the rotors and the issue will be gone.
your rotors on the front are warped. they need to be turned or replaced.
Brake rotors wear just as brake pads do and when they wear down beyond minimum specs they become unsafe. Good brakes are a # 1 priority.
The most likely problem is warped rotors. Have rotors turned or replaced. Replace front brake pads.