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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 Wed, Oct-18-2017, 10:17:14 PM   #1
elcidce91
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Default 2003 Convertible M3 Diff Bearing?

I just purchased my 2003. 83k miles. There is a clunk coming from the drive train and I believe its the Diff Bearing. Happens when I slow the car and it will make several clunks in a row and is also making single clunks as well. Seems ok when the cars pulling.

I was hoping I could get any opinions if thats something I can do at home or I should take to a shop. If so what would that run at a an independent shop? Parts and labor.

I can do some maintenance but I doubt I have the tools and experience to change them. It looked hard from the videos I saw. What does everyone recommend?

Finally what else should i consider having changed at the same time? Guibo? Any other bushings mountings for the diff?
Thanks.
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Old Thu, Oct-19-2017, 04:23:35 AM   #2
Tiag //M
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Default Re: 2003 Convertible M3 Diff Bearing?

hey OP, do you mean the diff bushings?
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Old Thu, Oct-19-2017, 02:21:52 PM   #3
elcidce91
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Default Re: 2003 Convertible M3 Diff Bearing?

Like I said I'm still learning about the car. If its bushings or bearings, Id defer to others experience. I think its the pieces that hold the diff on the car so is that bushings? Bearing are internal to the diff? I haven't had time to look it up in the service manual books yet. Thanks.
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Old Thu, Oct-19-2017, 04:58:31 PM   #4
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Default Re: 2003 Convertible M3 Diff Bearing?

SMG? When coming down to around 1000-1400rpm, SMG gets a little clunky with backlash. Even my E60 M5 did that. Given 2003 and not knowing much history, could be slop in the driveline all the way from the guibo back to the axles, including driveshaft and diff. First thing I'd check since it's pretty much free are the diff bolts. The originals are known to loosen; superseded by a new part that doesn't back out as easily.
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Old Fri, Oct-20-2017, 02:45:57 PM   #5
elcidce91
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Default Re: 2003 Convertible M3 Diff Bearing?

Forgot to mention this is a 6sm transmission.
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Old Fri, Oct-20-2017, 06:09:00 PM   #6
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Default Re: 2003 Convertible M3 Diff Bearing?

Maybe a bad front diff bushing. Hopefully no snapped rear diff bolts, if they haven't been updated.
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Old Mon, Oct-23-2017, 03:23:56 PM   #7
elcidce91
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Default Re: 2003 Convertible M3 Diff Bearing?

Any idea what the dealer would charge to fix this as a reference? What would I expect for a private shop to bill for this?

Should I look to buy a set of all of the bushings before we start to do all of them at once? Poly? Should this be fixed asap?

I just dropped $900 to get my left front convertible latch for my convertible roof fixed. If I didn't complain about the cost the parts alone would have been $1000 and 2.5 hrs of labor. I'm not too excited about dropping more money on the car soon.

Thanks!
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Old Mon, Oct-23-2017, 03:50:42 PM   #8
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Default Re: 2003 Convertible M3 Diff Bearing?

Nobody actually knows what your problem is until taking a look at the car. So there's no way to give a reference. My opinion? Time to buy a set of tools and start learning how to wrench.
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Discussing 2003 Convertible M3 Diff Bearing? 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)