[ectar]

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.

 

[DrivenDaily]

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?

 

[ectar]

Thank you guys for replies!!!
I did:
"When I set Neutral and rolled car down hill with engine on - still same behavior."

I have to use good enough hill to reproduce constant speed on N, funny thing is that on small hill car slowing down!! But In my described test when engine disconnected - N gear and car rolls downhill it sounds the same like on regular gear.

I will try to run car downhill on N and engine off. Can I do this?

last time oil change 5k km ago, and no any other work done, except:
I've replaced tires very close to the noise event (may be it is all season crappy tires? ) When I lover the window and listed while driving I don't hear this noise coming from outside.....

My chevy dealer is very bad, doesn't want to talk, wants me to take car over, I just don't have time for this - one car in family.

 

[Euthymia]

Wheel bearing?

 

[08chevymalibultz]

When I was reading this, it reminded me of my son’s 06 Malibu LT. Last month I had drove his car for the very first time since he has owned it and I could hear a roaring sound. Yuk!

My son thought it was road noise coming from the tires! I told him no way and that his tires are not aggressive at all! My Goodyear Triple Treds Make less sound than what I was hearing! Sounds like something with the Trans / axel or something!

Maybe a wheel bearing problem but I doubt it! Told my son that he really needs to get it into the shop and have it checked out! Seems to be another common problem within those years!

I don’t know or can say what the issue is because my son has not taken it into the shop yet but your problem sounds just like my son’s Malibu!

It may be worth looking into a extended warranty if you don’t have one! I can only imagine what this is going to cost to get fixed if the Dealership gets their hand on it. $$$$$

You might save yourself some money from an independent shop but you need to use some caution and make sure you find one that you can trust! Today everyone is looking to take your money!

Good luck!

 

[ectar]

Wheel bearing?

Don't know! How can I test this?

 

[ectar]

New development, when I turning left noise gets quite dispersal depending on curvature. I might be wheel bearing but what side is bad?

 

[chevyguy8893]

Since the noise changes on turns I would say it is the wheel bearing. Best way to test it would be to jack up the car without the wheels touching the ground, and use either a very long screw driver or stethoscope on the wheel bearing (none moving part or your ears will hurt) and compare the two sides while the car is in drive and making the noise. The bad bearing will be loud. It would be safer if you can jack up the whole car, or take it to a shop that might help you determine the source.

I would first start with seeing if there is any play in them by grabbing the top and bottom of the wheel to see if it moves in and out (move top and bottom opposite ways). If that doesn't work then place your hand on the coil spring and see if you can feel excessive vibration while the car is in drive (also listen to the noise). If that doesn't work then you will have to go under the car and listen to it by the way first stated, but use every precaution doing this. Have an extra person around doing any of this to keep the vehicle at the needed speed and for safety.

 

[ectar]

Will do,
PS. What happened to my previous post, my English is not that good, those are definitely not my words ?!!

 

[ectar]

Ok, I got part from my friend and took a plunge and dissembled right side! We both agreed it was right. BUT I count take the stupid hub off, I hammered it as much as I could (we don't have fancy tool ) and no way it goes. Any recommendations how to remove it in house?

 

[ectar]

Does anybody have schematic of Maxx differential? How it lubricated?

 

[ectar]

LOL, obtained used J-42129 and what do you think?! I can remove it even with the tool!!!!! Any ideas what I can do? Can I use some rust penetrators to unseaze hub from axle?

 

[ectar]

Success! after 2 evening of hammering I finally manager to remove old hub from knuckle.
Few things - if axle seized to hub no way you can remove it without J-42129.
It was good guess which one of 2 makes noise, so I choose to replace left, and it was good guess, no noise anymore!

 

[JDS323]

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.

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.

 

[DrivenDaily]

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.

 

[JDS323]

Was not aware that these models had that issue is that a good thing that they disabled it does it affect it in anyways ?

 

[DrivenDaily]

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.