One of the more common reasons for your car shaking when you apply the brakes is due to substances gripping the rotor. When you press down on the brake pedal, a caliper applies pressure to the brake pad. Over time, brake pads accumulate oil, dirt, or other materials. When this happens, the substances can cause vibrations, particularly when you press the brake pads. Also, over time the rotors get thinner, making them susceptible to damage. During braking, excessive heat is generated and can cause the rotors to warp.
This can also lead to slipping brake pads. To prevent this issue, make sure you have your brake rotors replaced around the 70,mile mark. You might also notice a sharp noise coming from the outside of your vehicle when you apply the brakes. This noise could signal that your brake pads are worn.
If this occurs, replace your brake pads as soon as possible. Dry guide pins could be the issue if you notice your steering wheel shaking when you come to a complete stop. These guide pins are part of the brake calipers and are responsible for guiding the brake pad to the rotor. In order to work properly, these pins must be clean and lubricated.
When they become corroded or dry, they can cause the brake pads to push down on the rotor at the wrong angle or the caliper to stick. To determine if you have dry guide pins, visit a service center since the caliper must be removed, inspected, and lubricated. Fixing this problem also often involves examining the caliper housing and handling high-temperature grease.
You might have alignment problems if you brake at speeds higher than 50 miles per hour and notice your vehicle shuddering. The thickness of the rotors plays a key role. The rotors will get thinned out over a lifetime of use - even normal braking will gradually remove material from the rotors. And normal braking produces heat from the friction of the pad clamping down on the rotor. As the rotors slowly get thinner, they are less able to absorb this heat and the possibility of damage goes up.
Driving in a mountainous area where brakes are applied continuously on the downward slope will overheat the front brake rotors, causing them to warp, which will result in a brake pulsation. Front calipers that do not retract after braking will cause overheating of the front brake rotors and lead to warping. This usually happens in higher mileage vehicles when rust and corrosion prevents the calipers from retracting, which keeps the brake pads in contact with the brake rotors.
If the rotors get warped, they will cause vibration whenever the brakes are applied. Sometimes you can have a brake job performed and the rotors are turned down too far have too much material removed. Brake rotors and drums are marked with a minimum thickness that they can be turned down to.
Reducing the thickness too far contributes to poor heat transfer, leading to rotor warping. Most rotors are not perfectly true when they are new. If new rotors are stacked on top of each other in storage it can result in warped rotors. Rotors need to be stored by standing them on end which prevents this warping. Any mechanic worth their salt will know these things. The number one reason for the problem? And finally, the number one reason for pulsating front brake rotors is over tightening the front wheel lugs.
Vehicles that are out of alignment also produce a brake shudder when engaging the brake pedal. Vehicles that are out of alignment can cause premature tire wear and damage to vital suspension components. Likewise, over time, suspension components including wheel bearings, tie rods, and ball joints may wear out due to normal wear and tear. When these components wear out, the braking experience can be affected. If the vibrations and shaking occurs with normal braking during a turn, your suspension system may be at fault.
A knowledgeable technician should inspect your vehicle to let you know whether replacing brake pads, brake rotors, or having an alignment performed on your vehicle is recommended to eliminate shaking and vibrations when braking. However, in some cases replacing your brake rotors or having them resurfaced will fix the brake shudder. Over time, the heat created from friction causes damage to the braking system. However, excessive heat can also be caused by driving habits, overuse, or poor quality brake components.
Drivers that speed from light to light and brake suddenly can wear down brakes much faster than the average driver. Though brakes are engineered to withstand extreme temperatures and are able to cool down between uses, frequent use does not allow for the proper cooling to occur, eventually leading to a spongy brake pedal feeling known as brake fade.
Brake fade decreases the pressure in the braking system that is vital in stopping your vehicle. Similarly, overuse of front brakes could create scorch marks on rotors, along with a rather unpleasant smell that cause permanent damage, requiring replacement. Poor quality brake pads are made with less durable materials and are less tolerable of the heat created from friction which cause them to overheat.
Lower quality brake pads may also cause scorch marks to develop on rotors. Brake shuddering is a signal that your braking or suspension system needs attention.
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