Q: Thumping sounds while driving over sharp bumps

asked by on June 28, 2016

I have a high-mileage car with approximately 150,000 miles on it. It has an automatic transmission. It's been making some noises in the front end of the car on the left side. These thumping sounds occur when I hit a sharp bump during driving. Bumps are not the issue, but only sharp ones would cause the noise. At the shop, they had the struts replaced as they thought that was making the noise. It didn't help however. The noise can be heard only from the inside of the car. I went to the dealer and had the strut bushings and top links replaced, as they were bad. I had the alignment checked as well. It was fine. I checked every part I could, including bolts and lower ball joits as well as the exhaust. There are no loose parts either. The car steering is fine. The sound is still noticeable. Besides sharp bumps, the sound is also heard if I drive slowly over a sharp speed bump, making the noise at the end of the speed bump. It sounds like something heavy. Do you have any idea what could be making this thumping noise? Thanks.

The only part you did not mention and the most likely cause of the problem is the inside lower control bushings which could possibly be bad. I would also check the steering gear mount bushings for excessive wear.

Both of these bushings would be felt through the floor when hitting bumps. Have the bushings and lower ball joint checked for any looseness or rubber cracks, these should be replace as needed.

I’d suggest you have the vehicle inspected by a qualified technician who can diagnose the noise you’re hearing and repair it accordingly.

Was this answer helpful?
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

Gurgling noise while brake and pumping feeling in reverse

The intermittent illumination of the Check Engine Light (CEL) should be resolved by getting a CEL Diagnostic and then repairing the fault that is identified. Such a diagnostic might provides clues as to the other faults you are writing in...

Car starts, but won't go into gear

The nature of this issue will depend on whether you have an automatic or manual transmission. If the vehicle has a manual transmission, the clutch master cylinder and slave cylinder would need to be checked, along with the shift linkage...

When I begin to come to a stop and down shift my gears my RPM'S drop almost all the way down to zero & my car almost quits/stalls

Hello. This issue can e caused by a few different things. It can be caused by worn out spark plugs due to not having a tune up or it can be a number of other things. From my experience though...

Related articles

How Does Power Steering Impact a Vehicle’s Handling?
Many cars today, and almost all trucks and utility vehicles, feature power steering. Power steering (also known as...
How a Manual Transmission Works
A A manual transmission helps a vehicle achieve a desired speed through the use of gears, a clutch, and a shifter. It works like this: when the driver wants to shift gears, he or she pushes in the clutch pedal...
What Components of the Suspension or Steering Systems Are Prone to Fail?
In In automotive usage, the term "suspension" refers to all of the parts that connect the vehicle to the road. Every car, truck, and utility vehicle has a suspension that is designed to do three things: Support the vehicle...