Axel Bearing Noise Question

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jrusso07
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Axel Bearing Noise Question

Post by jrusso07 »

I read the tech wiki write up on rear axel bearings. I have a light scraping sound coming from the rear end, It is speed sensitive. I would estimate one scrape per one wheel revolution. Does this sound like a bad axel bearing to you? I think so...ugh. :(
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Re: Axel Bearing Noise Question

Post by Gregs672000 »

Brake may be dragging on the drum/rotor?
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GeoffM
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Re: Axel Bearing Noise Question

Post by GeoffM »

Light scraping could also be a brake shoe or something dragging as well...but it very well could be a bearing.
When my rear axel bearing was toast, it was a 1x wheel RPM whomp-whomp-whomp that you could feel.
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Re: Axel Bearing Noise Question

Post by redroadster »

A pitted bearing ...the most common failure growls even if your barely moving
Moisture on the drum inside drains to the bottom
Then rusts
Last edited by redroadster on Sat May 15, 2021 5:55 am, edited 1 time in total.
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Re: Axel Bearing Noise Question

Post by Nissanman »

I would pull the rear wheels and drums and give everything a good clean and inspection.
It doesn't take much debris to cause an annoying noise like that.
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Re: Axel Bearing Noise Question

Post by JT68 »

very often a part of the rear backing plate drags on the drum. Take off the drum and look for a shiny wear spot on the back plate.
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Re: Axel Bearing Noise Question

Post by Solex68 »

I need to pull my drum as well then. I have a similar sound.
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Re: Axel Bearing Noise Question

Post by jrusso07 »

Thanks for your input. I will go through the brakes and pull the axels...I don't feel any vibration but the noise is concerning.
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Re: Axel Bearing Noise Question

Post by redroadster »

A 3ft screwdriver placed at the bearing area to the ear or mech stethoscope or electronic ears
car on the rack, running in gears, will tell you , it's loud
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Re: Axel Bearing Noise Question

Post by jrusso07 »

Thanks red, don't have a 3 ft screwdriver but I do have a 3 ft breaker bar - that should work as well, I think
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Re: Axel Bearing Noise Question

Post by spl310 »

A mechanics stethoscope is about $4 at harbor freight
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Re: Axel Bearing Noise Question

Post by Gregs672000 »

spl310 wrote: Sun May 16, 2021 9:11 am A mechanics stethoscope is about $4 at harbor freight
Ya, just don't blast your ear with it! After many years of rock n roll drumming my ears are very sensitive and I have cringed listening to things at times with mine!
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Re: Axel Bearing Noise Question

Post by Solex68 »

I checked my noise this afternoon using the ol' Habor Freight stethoscope in my garage. It all sounded great.
I took off the drums to inspect and everything looked good there too. No metal on metal.
I did notice a little fender lip scrubbing on my drivers side. I need to find someone who can roll it a bit.

On another day I need to refresh the paint on my drums or check my spare set to see if they are any good, maybe be easier to paint those ones.
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Re: Axel Bearing Noise Question

Post by jrusso07 »

Spent a few hours going through the brakes and listening to rear axel bearings with stethoscope. (Doh! My Wife is a nurse and had an old one in her stash).

I found minor rubbing of the drum on the backer plate on passenger side and quite a bit of brake dust on the shoes…listened to the bearing and they sounded smooth - more noise from the differential. Cleaned up everything and went for a ride. No noise! Sigh of relief not having to replace axel bearings.
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Re: Axel Bearing Noise Question

Post by spl310 »

Good deal Joe. The scraping sound is a classic backing plate noise. Bearings usually howl.
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