E46Fanatics (http://forum.e46fanatics.com/index.php)
-   ///M3 Forum (http://forum.e46fanatics.com/forumdisplay.php?f=65)
-   -   the "M" clunk theory. (http://forum.e46fanatics.com/showthread.php?t=947530)

Cayne23 09-28-2012 06:01 PM

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

Cayne23 09-28-2012 10:00 PM

Anyone have any ideas?

greenhobby 09-30-2012 06:17 AM

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?


illestminimike 09-30-2012 01:14 PM

It's just normal. Enjoy the clunk.

Bimmer4Lyfe 09-30-2012 01:23 PM


braymond141 09-30-2012 04:01 PM

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.

Cayne23 09-30-2012 09:03 PM

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

greenhobby 10-01-2012 07:16 AM

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).

S54Dan 10-01-2012 09:13 AM

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.

All times are GMT -5. The time now is 04:15 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - 2016 performanceIX Inc - privacy policy - terms of use