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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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Old 09-04-2016, 01:06 PM
vinzchau9 vinzchau9 is offline
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Location: London
 
Join Date: Mar 2015
Posts: 14
Mein Auto: BMW E36 Convertible
BMW E46 323 - Whining/Howling noise from drivers side rear

Hi All,

Over the last month I have been experiencing a slight whining/howling noise coming from the rear drivers side at around when I shift into 4th gear at around 30mph. This noise then goes away once I am in gear and drive on. Also I have tried coasting at around 30mph and the noise is still audible. When I de-accelerate to 30mph the noise is audible too.

At first I thought it might be tyre noise, however I have rotated my rear tyres with my front tyres and there has been no change. This then led to me thinking it could be a differential issue, so I changed my diff fluid using Redline Synthetic Gear Oil (75w140) and put in liqui moly gear additive in the hope it would quieten the noise, however this has not worked.

Could it be something further with the diff like a bearing wearing out or gearbox/clutch related?

Thanks

Last edited by vinzchau9; 09-04-2016 at 02:27 PM.
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Old 09-07-2016, 09:20 PM
Y2K_Bimmer Y2K_Bimmer is offline
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Location: Glendale, AZ
 
Join Date: Mar 2011
Posts: 429
Mein Auto: 2000 323i
Wheel bearing would be a good place to start.
And 4th gear at 30 mph? jk
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323, bmw, bmw e46, differential, drivers, e46, noise, rear, side, whining noise, whining or howling


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