What is the whirring sound in the back? - BMW Forum - BimmerWerkz.com

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post #1 of 3 (permalink) Old 11-08-2010, 09:12 PM Thread Starter
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What is the whirring sound in the back?

OK I'm back with another question. So the 325 I got runs great and hardly anything wrong with it, had front engine worked on extensivley a couple months ago, but I notice a deep whirring sound coming from the back when driving. I was told it's the hubs and hub spindles that need replacing...does this sound about right? Is there anything else I should be looking at or replacing while the mech is back there? Also, anyone have a round about figure on how much this will cost me to get them replaced, what can I expect to pay? Thanks again and sorry for all the questions, I just like to hear opinions and facts from people who've been there and done that.
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post #2 of 3 (permalink) Old 11-09-2010, 04:13 AM
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It could be the diff...change the oil or one or both of the rear wheel bearings..

What I would do is raise the rear end and check for movement in the rear wheels also give them a spin you may have ridges on the outer edge of the discs/rotors.


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post #3 of 3 (permalink) Old 11-20-2010, 05:40 AM
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find a bendy road if it gets louder going round a left hand band then it'd the rear o/s and the other side for a right hand bend. if it increases in sound in terms of pitch like your engine does when the rpms go up then i say the diff. a friend had that on his 320i touring. i had that bearing problem about a month ago done now though
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