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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 09-29-2014, 02:33 PM   #1
repaxx
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Clunking noise when disengaging clutch

Hi guy! I have a 2003 M3.
Recently, I have been experiencing clunking noise problem whenever I shift gears
I noticed that everytime I disengage the clutch, it would make a thumping or clunking sound coming from the rear. I took it to a local shop which specializes on BMW and Mercedes and I was told that the LSD is slipping/worn out. And getting a new one would cost me $8K plus roughly $500 labor.
The noise is always absent whenever accelerating or cruising, I only hear it when I let go of the clutch after shifting or during cruing then I suddenly step on the clutch. I am no mechanic but doesn't it that LSD only applies when needed during hard acceleration?

I am getting a second opinion from a dealership tomorrow.

I also need your opinion as I believe more trusted than most shops.

Thank you in advance
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Old 09-29-2014, 04:06 PM   #2
Alan
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The E46 M3 clunks. Its well-known and oft discussed.

Just ensure your subframe mounts and bushings are in good condition. Any good indy shop can do that.
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Old 09-29-2014, 04:56 PM   #3
n3985
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Originally Posted by Alan View Post
The E46 M3 clunks. Its well-known and oft discussed.

Just ensure your subframe mounts and bushings are in good condition. Any good indy shop can do that.
+1

if it is clunk during acceleration check differential bushing and the diff bolts as well

if it is during deceleration like coming to a stop and pressing in clutch it is normal
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Old 09-29-2014, 05:02 PM   #4
repaxx
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Originally Posted by n3985 View Post
+1

if it is clunk during acceleration check differential bushing and the diff bolts as well

if it is during deceleration like coming to a stop and pressing in clutch it is normal

Thank you for all your replies. I really appreciate your help.

Cheers!
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