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Could be many things, but your rotors are probably warped, or cracked, or about to go. Not something you want to let slide, especially if you have kids in the car. Just picture them all the sudden not working at all, or locking up unexpectedly... what are you gonna do??

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Q: Why does my car shake and rattle when i apply the brakes at high speed?
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While driving, apply the brakes gently for a short distance, as you maintain your speed.


Your car has a shimmy when you apply the brakes at hi speed?

The most likely cause is a warped rotor. It can also be other things so have you brakes and suspension inspected.


When speed up 45mph to 60mph on the highway then to slow down the right driver wheel begain to shake and rattle what do you think is wrong?

Your front end is probably out of alignment. Have it checked at a mechanic.


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If the brakes fail on your vehicle the parking breaks may be used to help stop the vehicle as well?

Yes, the parking brakes can be used to stop the vehicle in emergency. But remember that, in most of the vehicles parking brakes apply only to one pair of wheels, so if the vehicle is in high speed, one has to apply them carefully and save the vehicle from skidding.


What affects speed?

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What cause your car to shake when driving at a low speed like the tires are gone come off and the only way to stop it is to hit on brakes then the shake stop?

That means person inside car is either too heavy or something like a toy is caught in engine


Why a car vibrate at high speed and its steering wheel shake when braking just at high speed?

High speed vibration is often an indication of a wheel that is out of balance or a bent rim. It can also be a bent driveshaft or bad U-joint. Vibration when you brake at high speed is almost always a warped rotor on the disk brakes.


If you are applying the brakes on your bicycle are you accelerating explain?

Using brakes slows your speed.


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Why would a car shake after getting new brake pads and rotors?

Since you didn't specify WHEN it shakes (high speed, when using the brakes, low speed???) here are a couple possibilities:wheel balance,worn suspension,worn steering linkage,bent wheel,defective tire.And if it only occurs when you use the brakes, it could even be a faulty rotor even if it IS supposed to be new.