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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Dec-27-2018, 11:22:46 PM   #31
OneFastSicilian
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Default Re: differential whine

The second you add poly bushings to the diff, it whines... that is all.
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Old Sun, Dec-30-2018, 03:39:52 PM   #32
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Default Re: differential whine

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Originally Posted by chsbmw View Post
Thatís good to know thanks. Diff is going back to the builder this week. Want it corrected where the whine goes back to how it was prior to rebuild and then will contemplate on going the OEM route.

Perhaps going back to OEM will help with the thump as well. Shop is throwing on a new DM flywheel to see if that helps with the clunk/thump. Takes away from the whole driving experience.


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I used to have a JB racing aluminum single mass flywheel and it whined like an absolute *****. I am ever so glad that I switched back to a OEM DM flywheel.
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Old Sat, Jan-05-2019, 09:38:01 PM   #33
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Default Re: differential whine

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Originally Posted by Toxic0n View Post
Don't all diffs whine and the poly bushings just transmit the noise better?
I have OE bushings and after installing the Mason brace, I can hear the diff whine with the seats down at highway speeds.
Recently got solid subframe bushings + brace + OE diff bushings and fresh OE fluid.

I'm also getting some 70-85mph diff whine it sounds like (speed dependent, not RPM).

What subframe bushings did you go with? I'm suspecting even OE diff bushings but solid subframe plus brace = more noise also.
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Old Wed, Jan-09-2019, 11:10:43 PM   #34
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Default Re: differential whine

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Originally Posted by aznbo187 View Post
Recently got solid subframe bushings + brace + OE diff bushings and fresh OE fluid.

I'm also getting some 70-85mph diff whine it sounds like (speed dependent, not RPM).

What subframe bushings did you go with? I'm suspecting even OE diff bushings but solid subframe plus brace = more noise also.
I still have the original subframe bushings in there They looked fine when I was installing the Mason brace, going to replace them this year along with diff bushings. Will stick to OE.
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Discussing differential whine in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)