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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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09-28-2012, 06:01 PM
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#1 |
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Registered User
Join Date: Sep 2012
Location: forest hill, md
Posts: 152
My Ride: 2002 m3 convertible
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the "M" clunk theory.
I was playing with my car the other day driving around. I started to notice the clunk sometimes. More so in low gears. It almost feels as if the driveshaft goes into neutral in between shifting. Engages when clutch pedal is let out. Just a idea. My eclipse, like so many other eclipses', had a rattle sometimes when it was started. Turn off, restart, no rattle
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09-28-2012, 10:00 PM
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#2 |
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Registered User
Join Date: Sep 2012
Location: forest hill, md
Posts: 152
My Ride: 2002 m3 convertible
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Anyone have any ideas?
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09-30-2012, 06:17 AM
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#3 |
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Registered User
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Absolutely normal. The limited slip diff has adjusting mechanical bits in it and they (like the valve train) are loud sometimes. Are you using aftermarket diff fluid?
-gh |
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09-30-2012, 01:14 PM
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#4 |
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Registered User
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It's just normal. Enjoy the clunk.
__________________
 -2003 M3 Vert -1967 Mini Cooper |
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09-30-2012, 01:23 PM
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#5 |
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Registered User
Join Date: Nov 2008
Location: 129 West 81st St. 5A, New York, New York 10024
Posts: 2,205
My Ride: 02 325i
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Nm
__________________
-j Last edited by Bimmer4Lyfe; 09-30-2012 at 01:32 PM. |
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09-30-2012, 04:01 PM
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#6 |
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Registered User
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No this isn't quite "normal" as people make it out to be. Improper driveline maintenance and/or driving skills are to blame. A "normal M clunk" is almost nothing and only shows up quietly when you improperly shift. A well maintained driveline will be very solid and free of issues. This includes; motor mounts, transmission mounts, center support bearing, center support, giubo, differential bushings, differential bolts (which break), differential condition, subframe bushings, subframe pan, rear trailing arm bushings and ball joints. If you've owned a low mileage well cared for car you know what the E46 M3 is supposed to feel like. If you haven't and you have a 60k+ car, I suggest you start turning some wrenches to inspect each and every failure point.
Last edited by braymond141; 09-30-2012 at 04:05 PM. |
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09-30-2012, 09:03 PM
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#7 |
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Registered User
Join Date: Sep 2012
Location: forest hill, md
Posts: 152
My Ride: 2002 m3 convertible
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I have all the oem fluids. I've been driving manuals for 20 years. Its not that im banging gears. Im shifting smoothly. I just think its a little engaging/disengaging of the driveshaft. The lsd idea seems to make sense too
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10-01-2012, 07:16 AM
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#8 |
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Registered User
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As I said, it's perfectly normal. To put yourself at ease, make sure your fluids are full (should be up to bottom of upper diff fluid hole) and seals are not leaking. At low speeds doing figure 8's and pressing clutch in and out, you will hear it (some say it sounds like a universal joint clunk).
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10-01-2012, 09:13 AM
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#9 |
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Registered User
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A small clunking is normal, but if you are driving at very low speeds (parking lot) and you notice more clunking, I'd start by replacing your steering column guibo.
__________________
 2005 M3 6MT | Weekend toy & Track rat 2003 330i ZHP 6MT | Wife Mobile 1994 325i 5MT | DD BMW NA Accessory Champion | Twitter | Instagram @S54Dan Last edited by S54Dan; 10-01-2012 at 09:13 AM. |
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