Skip the auto shop - Our mechanics make house calls

Q: hard thud when driving

asked by on

Test drove a car. Had kind of a thud when starting out. Seller said it was a brake caliper slide sticking. He just had the brakes done at Monroe. Does that sound right?,I'm concerned it could be the transmission. Thank you for your assistance.

My car has 125000 miles.
My car has an automatic transmission.

A: Hello. A sticking brake caliper slide can c...

Hello. A sticking brake caliper slide can cause the car to seem like it is losing power, but it will not usually cause a thud noise. From my experience with this car, thuds are almost always from worn out engine and transmission mounts, a bad CV axle, or the transmission failing. I typically inspect the mounts for wear first and then check to see if there is excessive play in the CV axle joints. If those are fine then it may be the transmission. Getting the vehicle on a hoist and running it to see where the noise is coming from helps. If you wanted to have this looked at before you buy it, consider YourMechanic, as a certified mechanic can come to the vehicle and give the car a full pre-purchase inspection so that you can buy with confidence.

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: purchase a used certified car?

Both engines that were used in the 2016 Tuscon were equipped with maintenance-free silent timing chain systems. Consequently, there is no recommended replacement (mileage) interval and, indeed, the timing chain could outlast the car unless the engine is abused. As...

Q: Disconnected 2ga wire from battery; rehooked, but warning light on

Hi, thanks for writing in about your 2006 BMW 740i. Disconnecting battery cables while the engine is running causes a voltage spike in the electrical system. Electronic control modules typically do not take this well! Sometimes this will damage some...

Q: Brake pedal slowly becomes firm to press after short period of driving

Hello and thank you for your question. The problem lies within the proportioning valve in the brake system. The valve could be plugged up with debris in the system making the valve stick. If the proportioning valve is okay and...

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...