Yesterday noticed noise coming from front, please help mitigate the problem.

20537 Views 16 Replies 6 Participants Last post by DrivenDaily, Aug 22, 2019

ectar

Discussion Starter · Apr 19, 2011 (Edited)

Yesterday noticed noise coming from front. I sounds like it has med to high pitch.
I may describe it like grinding/growling noise (may be it is not but having hard times to describe exactly), It sounds like gear on gear (but without metallic clings, muffled) or like tire with big and wide groves on pavement.
Don't see any drop in performance. And when I open windows it doesn't sound like noise from tires.
Noise is getting more high pitch as accelerating, but start to be noticeable only at 35 km/h and up. at 60km/h is loudest, then a bit quilter.
When I set Neutral and rolled car down hill with engine on - still same behavior.
Will try to run car downhill w/o engine running.

While on park did 0-4k rpms without that noise.

Haven't tried long driving backwards for long distance. On regular parking at malls and backing from drive way at 5-10 kmh no noise. But maybe I it has to be quite fast about 35-40 km/h to notice.

Oil level is fine a bit on lower side but within the level (it is 400km past needed change), didn't notice oil leaks. Don't know how to check tranny fluid level.

Any ideas? And if you have idea how to verify it?

Thank you.

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DrivenDaily

· #2 · Apr 19, 2011

It's not clear from your post, but does the noise change with ROAD speed or ENGINE speed? It sounds like ROAD speed. If you're not sure, get car to make noise then place trans in N. Does noise slow down or stay nearly constant? Slowing is an issue with rotating portions on engine, Constant is an issue with half-shafts, bearings, wheels, etc.

Sounds as if you could have a plastic fender liner or other shroud rubbing on the CV joint or tire. Check up front first.

Did you recently have any service performed on your car, like an oil change?

Did you drive over any debris in the road or any potholes?

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DrivenDaily

· #15 · Aug 22, 2019

JDS323 said:
Hello

I have a 2018 Chevy Malibu that had a similar noise more like a loud humming noise coming from the rear when speed is between 20 and 40 sounds like if you have subwoofers in the car.
Took it to my dealer I was told it was a sound damper that Malibu cars have you might want have that checked out. It took care of my noise now I don’t hear that noise at all.

The last post before yours was 8 years earlier.

The Gen9 model, which is what your 2018 is, tends to suffer from the ANC going bad. Dealers are being instructed to disable it when owners complain of a loud humming noise, just like you describe.

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DrivenDaily

· #17 · Aug 22, 2019

If you check out the Gen9 section you'll find information about that and be able to read a lot more than I can relate here.

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