Skip the auto shop - Our mechanics make house calls

Q: Braking

asked by on

Whenever I brake there is an extremely loud roaring. Like an airplane taking off. My brake pads should be fine as the car is serviced every 6months. I also have a squeal that sounds like the tire spinning while driving. My last service they told me both my shocks were gone and need replacement. But this loud sound when braking started very suddenly one day, and has been very bad and loud ever since.
My car has an automatic transmission.

A: This may be a sign of warped brake rotors. ...

This may be a sign of warped brake rotors. As you may know, when you press on your brake pedal, this activates a hydraulic pressure which forces small pistons inside your brake calipers to push the brake pads against the brake rotors which is what causes the stopping power you are familiar with. When this happens, an enormous amount of heat is generated due to the friction between the brake pads and rotors. As the brake rotors eventually cool down and then heat up again the next time you press on the brakes, over time this can cause them to warp slightly causing very small low spots on the surface of the brake rotor. When this happens and the brake pads are applied again to the rotors, this causes an uneven surface (on the rotor) to be applied to the flat surface brake pad, which can cause a vibration, shaking or very loud grinding sound. I would recommend having an expert from YourMechanic come to your location to diagnose and replace your brake rotors.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car overheated on freeway

Hello. If the car will only overheat on the freeway and not anywhere else, I suspect you may have a common civic issue, which is a failing head gasket. Head gasket repair is generally pretty expensive. But there are other...

Q: Car keeps dying

Hi. If the battery is dead every time this occurs then it may indeed be a bad battery or there may be an electrical issue. A battery can test fine, but have an internal short that can cause the battery...

Q: Car independently accelerated and brake did not work - 2013 Lexus RX450H

Hi there, thank you for asking about your 2013 Lexus RX450H. This behavior is known as unintended acceleration, and your model is included in an expanding multi-district litigation on this issue against Toyota. Check the news frequently about this action...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...