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Re: vibration when applying brakes
First check the brake pads in the car ,also if the car as the ABS in it then it will generate a series of vibration when are applied brakes indicating its working ,if there excess vibration you need get your brakes checked ....
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If you are not a heavy footed braker... then you have an ABS module problem. There are several sites on line that will do an exchange for a rebuilt one for around $100. If you are a heavy footed braker, your car is behaving normally, Just don't press so aggressively and the vibration won't happen. ABS brakes are supposed to shudder and vibrate when activated, they apply pressure to your brake calipers at roughly 15,000 times a sec, off and on to prevent the brakes from locking up and the car loosing control. In a panic stop, press a car with ABS brakes ALL THE WAY TO THE FLOOR as hard as you can, use the steering wheel for leverage and push the pedal down a bit more, RIGHT BEFORE IT COMES TO A COMPLETE STOP.
2 things spring to mind. If stopping under heavy brakes ,the abs could be working giving you the impression of vibration But I am inclined to go with warped disc rotors. They give the impression of pulsations under you foot and will vibrate the steering to a degree. Check discs for condition ans check pads for lining thickness Anything under 1/4 of original thickness should be replaced
if you feel the pulsation in brake pedal when stopping. its a warped brake rotor thats causing it. for bad cv joint symtoms--- Unusual noises when making turns. As you are driving on the road and you make a turn at the corner, if you start hearing unusual sounds coming from under the car then this is one of the symptoms of a bad CV joint. These noises will sound like something is clicking beneath the car every time you turn the steering wheel. Evidence of a damaged boot. Steering wheel feels heavier. The steering wheel will start to feel tighter and heavier and you can hardly make simple turns to the left or right. In severe cases you might even feel heavy vibrations like you are driving down a rocky road.
Sounds like you have warped rotors and or a lose caliper mounting bolt . When you stop do you feel a vibration in the brake peddle or in the steering wheel or both ? IF you feel the pulsation in the brake peddle I would suspect a brake pad / brake rotor problem . Now if you do not feel it in either and the vibration is through the whole car with out the brakes being applied i would think it may be related to and engine/drive line problem (motor mount /trans mount /axle problem)
im asuming you are feeling the brake pedal pulseing under your foot,should'nt be to much vibration at the wheel. most likely the brake rotors are warped they can me turned down at a shop, or sometimes almost as cheap to buy aftermarket replacements
You say you hear the noise when you "slow down". Does this mean you hear the thumping noise when you let off the gas and let the car coast to a stop or only when you are applying the brakes to decellerate?
If you only hear the noise while applying the brakes then I would assume it has something to do with your brakes. The first thing that comes to mind would be rotors that aren't true or warped which could make a thumping sound.
Do you feel any vibrations in your foot when it is applying pressure to the brake pedal? If you do feel a sort of pulsating feeling then it could very well be your brakes making the noise.