Skip the auto shop - Our mechanics make house calls

Q: Left back is grinding and wobbling like crazy, what could it be?

asked by on

Was driving home, back left side started grinding and wobbling horribly. What is wrong?

My car has 198000 miles.
My car has an automatic transmission.

A: Hi, thanks for writing in. So long as the w...

Hi, thanks for writing in. So long as the wheel and lug nuts are tight, the most common cause for grinding is worn brake pads or shoes, depending whether your vehicle has rear drum or disc brakes. When the brake friction material is worn away, the metal backing plates of disc brake pads or drum brake shoes, will start rubbing on the drum or disc. That will give you a grinding sound and vibration. Continued driving will cause more damage and will likely become a safety hazard. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to perform a brake system inspection for you, and make or suggest the necessary repairs needed.

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

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 dies at idle

You may have a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. Since...

Q: why wont my car pass smog

There are many components that work together to ensure your vehicle produces low emissions. It can be something as simple as a vacuum leak or faulty PCV valve, or even a faulty oxygen sensor or catalytic converter. If you didn't...

Q: Do I need a brake fluid flush when I replace my brakes?

Brake fluid, like other fluids used in our vehicles, is subject to degradation over time. Brake fluid is a hydraulic and hygroscopic substance which means it absorbs moisture if left exposed to atmospheric humidity. Minute pieces of rubber can break...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...