Why does the car shake while driving?

Written by william zane
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As cars age, the components on it can suffer from a multitude of ailments. Suspension bushings can become cracked and dried out, wheels can become bent and tires can be worn. This happens from normal use and can also be accelerated by accidents and a variety of driving conditions, such as rough roads and surface conditions. Your car may shake while you are driving for a variety of reasons.

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Poor Alignment

Poor suspension alignment can cause a car to shake and vibrate. Suspensions can be knocked out of alignment by a variety of things, including rough roads, curbs and accidents. Your car’s alignment should be checked regularly. The suspension should also be aligned if new wheels, tires or even shocks are installed in the car, as these can all affect alignment settings.

Bent Or Worn Suspension Parts

If a car is in an accident or hits a curb—even at low speeds—the suspension components can easily become bent. This includes parts like control arms, trailing arms and other thin, vulnerable suspension parts. In order to fix this problem, the bent parts should be replaced and the car realigned.

Old Tires

Tires that are out of round or unevenly worn can cause a car to shake and vibrate when it is driven due to the uneven tread pattern or the fact that the tire is not perfectly round. If your tires are unevenly worn, the only solution is to replace them with new tires.

Bent Wheels

The wheels on cars and trucks often become dented or bent, particularly if the vehicle is driven into curbs during parking or driven over large potholes and ruts at higher speeds. The bends in the wheels will make the car vibrate and shake at whatever corner the wheel is at. The solution is either sending the wheel to a wheel repair shop or simply installing a new wheel.

Wrong Wheels

There are many different wheels available for today’s cars and trucks, but that doesn’t mean they all fit. One cause of shaking and vibrating can be a wheel that is not hub-centric, which occurs when the centre bore of the wheel, where it fits over the vehicle’s hub, is slightly larger. This causes the wheel to move around a very small amount at high speeds, though it is enough to cause shaking.

Bad Brakes

If the brake rotors on your car are warped, it may cause the car to shake, though this will generally only occur under braking. When the brakes are applied on a car with warped rotors, the brake pads judder and bounce over the uneven surface of the rotor, which in turn causes the road wheel to shake, sometime very strongly. The fix is replacing or possibly resurfacing the brake rotors.

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