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Old 09-23-2013, 05:33 PM   #1
jabela
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Normal wheel bearing and differential sounds?

Have a listen to the sounds from the wheels and diff while I had the rear end in the air. Ignore the scraping sound at the wheel, that's just the brake pad dragging

When I stop one of the wheels, the diff gets pretty noisy. I'm not sure if that's normal. Especially at 1:00 in.

Also listen to the clunking at 2:25, is that just normal driveline slack from the lack of load on the wheels? I never hear that while driving.



Thanks.
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Old 09-23-2013, 07:46 PM   #2
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if its not doing it while driving..who cares? lol
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Old 09-23-2013, 07:53 PM   #3
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if its not doing it while driving..who cares? lol
only the clunk isn't heard while driving.

I have a wump wump sound that varies with speed. it's either a bad alignment making the tire do it, a bad wheel bearing, or a bad diff.

I'm pretty sure it started after I bent a rim at the track.
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Old 09-23-2013, 08:16 PM   #4
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only the clunk isn't heard while driving.

.
ah, thanks for the clarification.
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Old 09-23-2013, 09:38 PM   #5
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When you stop one of the wheels, the spider gears in the diff are spinning really fast. This never happens when both wheels have decent traction so I wouldn't worry about it.

Try swapping some wheels to see if the wump noise changes. Got a spare? Swap front to back?
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Old 09-23-2013, 10:09 PM   #6
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Buy a stethoscope from princess auto or any automotive store and u will hear it or when u sway the car left or right the noise will go away if its a wheel bearing
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Old 09-24-2013, 12:42 PM   #7
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Buy a stethoscope from princess auto or any automotive store and u will hear it or when u sway the car left or right the noise will go away if its a wheel bearing
Yea, that's the thing, the noise from the right rear doesn't change with load when swerving. It just changes with speed, that's why I suspect alignment/tire noise.

Don't think I need a stethoscope, as you can clearly hear the distinct noises from the diff and wheels. I'm just not sure if they're normal or not.
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Old 09-24-2013, 12:43 PM   #8
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When you stop one of the wheels, the spider gears in the diff are spinning really fast. This never happens when both wheels have decent traction so I wouldn't worry about it.

Try swapping some wheels to see if the wump noise changes. Got a spare? Swap front to back?
Yea, that what I figured with the diff. Glad you agree.

As for the wump, I did swap left/right tires and the noise says there, so I figure that's an alignment or wheel bearing issue.
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Old 09-24-2013, 08:23 PM   #9
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Well if goes away on a when u are weaving u need a wheel bearing run your hand and the thread u will feel them if the thread is scalloping
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Old 09-24-2013, 08:51 PM   #10
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Well if goes away on a when u are weaving u need a wheel bearing run your hand and the thread u will feel them if the thread is scalloping
It doesn't go away when weaving. The tire tread is not unevenly worn, but it's only been happening for 200km.
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Old 09-28-2013, 09:22 PM   #11
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Here's what the wheel noise sounds like from inside. You can hear the humming, wump wump noise.

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Old 09-30-2013, 08:35 AM   #12
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Centre bearing?
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Old 09-30-2013, 09:25 AM   #13
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Sounds like a wheel bearing.

When the car was in the air with the wheels spinning, did you try putting your hand on either the shock or trailing arm for each side? Usually if it's the bearing you'll feel the metal on metal grinding with the wheels turning.
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Old 09-30-2013, 10:46 AM   #14
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Centre bearing?
Driveshaft center bearing? I doesn't sound like that's it.

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Sounds like a wheel bearing.

When the car was in the air with the wheels spinning, did you try putting your hand on either the shock or trailing arm for each side? Usually if it's the bearing you'll feel the metal on metal grinding with the wheels turning.
No, I didn't try that. That's a good idea though.
I didn't hear what sounded like grinding when it was in the air.
On the road I just hear the humming sound. Which to me is either the bearing or tire noise. Getting an alignment today so we'll see.
I didn't hear the humming when it was in the air, but that could be due to the lack of load on the bearing.
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Old 09-30-2013, 06:41 PM   #15
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Do you have a spare tire to test with? Maybe some snows?
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