BMW M3 Forum
BMW M3 Forum BMW M3 Gallery BMW M3 Reviews BMW M3 Social Groups BMW M3 Chat M3Forum Sponsors >>
Loading


Mobile M3forum
Go Back   BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X) > BMW M3 Discussions > E46 M3 (2001-2006)
Tire Rack Buy Winter Tires Now!
Not a member? Register Now!
Register Gallery All Albums Garage Search Today's Posts Mark Forums Read Calendar FAQ

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.


Reply
 
Thread Tools Display Modes
Old Wed, Nov-07-2018, 07:52:24 AM   #1
hatuey
Registered User
 
hatuey's Avatar
 
Join Date: Jul 2018
Posts: 127
In the garage:
Reputation: 0 hatuey is on a distinguished road
Location: Los Angeles

United States




Default Need help in diagnosing this clunking from the rear axles / diff

I've seen plenty of references to the M-clunk, but don't think this is it.

For this test, the rear was up and I was moving the tire forward and backwards and I noticed the play and the clunking sound. I've been noticing that sound on at low speeds mostly.

I've seen some posts about rotational play? Would that be considered what I was doing in my video?

Link to the video.


Thanks.
Jump to top hatuey is online now   Reply With Quote
Sponsored Links
Register now and remove these ads
Old Wed, Nov-07-2018, 01:44:09 PM   #2
Kieffer87
Registered User
 
Join Date: Feb 2012
Age: 31
Posts: 316
In the garage:
Reputation: 0 Kieffer87 is on a distinguished road
Location: Davenport

United States




Default Re: Need help in diagnosing this clunking from the rear axles / diff

How many miles are on your car/axles? I went down this road last year as well and I can't say I made much progress. I replaced the diff cover/bushings, while I was in there I confirmed there is zero play in the diff itself. Next I moved to the axles, I did find the inner cv joints of my axles had a bit of play in them. I ended up buying another set with 30k miles on them. That seemed to help but the clunk/play is still there as shown in your video. I also re-greased the driveshaft cv joint which again seemed to help for awhile.

Based on my experience, I don't think you have any immediate issues that you need to start replacing parts. But if you've got time and money to burn, I'd start with the axles, driveshaft cv joint and diff bushings. Be sure to properly torque the front diff bushing bolt.

EDIT: For reference here was my original post http://www.m3forum.net/m3forum/showthread.php?t=538264

While I mention the "m-clunk" is gone in that post, after a few track days and ~10k miles later it's back.
__________________

2003 M3 Alpine/Cinnamon Loaded
APEX ARC-8 18x9.5 ET35 wrapped in 265/35 PSS
TCKline D/A Coilovers (550F/600R) W/Monoball RSM, H&R Adjustable Sway Bars
Fabspeed Headers, UUC Corsa Exhuast, CPI RASP-X
Rogue Power Pullies, AA Tune, SS Lines, ZHP Steering Rack

Last edited by Kieffer87; Wed, Nov-07-2018 at 02:02:42 PM.
Jump to top Kieffer87 is offline   Reply With Quote
Old Wed, Nov-07-2018, 02:57:46 PM   #3
huxcrunner
Registered User
 
Join Date: Jan 2017
Posts: 71
In the garage:
Reputation: 0 huxcrunner is on a distinguished road

United States




Default Re: Need help in diagnosing this clunking from the rear axles / diff

Quote:
Originally Posted by Kieffer87 View Post
How many miles are on your car/axles? I went down this road last year as well and I can't say I made much progress. I replaced the diff cover/bushings, while I was in there I confirmed there is zero play in the diff itself. Next I moved to the axles, I did find the inner cv joints of my axles had a bit of play in them. I ended up buying another set with 30k miles on them. That seemed to help but the clunk/play is still there as shown in your video. I also re-greased the driveshaft cv joint which again seemed to help for awhile.

Based on my experience, I don't think you have any immediate issues that you need to start replacing parts. But if you've got time and money to burn, I'd start with the axles, driveshaft cv joint and diff bushings. Be sure to properly torque the front diff bushing bolt.

EDIT: For reference here was my original post http://www.m3forum.net/m3forum/showthread.php?t=538264

While I mention the "m-clunk" is gone in that post, after a few track days and ~10k miles later it's back.
I agree with the above. Seems like if anything its more to do with making mechanical parts/interfaces. Sometimes ive found its better to leave things alone then looking for problems. If nothing else some cleaning and a repack of grease cant hurt.
Jump to top huxcrunner is offline   Reply With Quote
Old Wed, Nov-07-2018, 04:09:47 PM   #4
antknee
Registered User
 
Join Date: Apr 2009
Posts: 1,905
Reputation: 0 antknee is on a distinguished road
Location: Staten Island, NY

Philippines




Default Re: Need help in diagnosing this clunking from the rear axles / diff

That type of play seems normal to me. I had a similar noise on my E30 transfer case years back, and i confirmed this particular play on my issue was normal. See my video below

__________________
www.instagram.com/snwmble
#snwmble

Current:
'05 BMW M3 - Silver Grey/Imola Red
'90 BMW 325iX - Sterling Silver/Houndstooth sport(5-speed converted)

Past:
'88 BMW 325iX - Diamond Schwarz/Silver sport *Sold*
'01.5 1.8TQ - Brilliant Black/Nogaro Alcantara ...after 8.5yrs, *Sold* =(
'90 BMW 325i - Schwarz/Tan sport *Sold*
'89 BMW 325ix - Diamond Schwarz/Black sport *Sold*
Jump to top antknee is offline   Reply With Quote
Old Wed, Nov-07-2018, 06:07:15 PM   #5
hatuey
Registered User
 
hatuey's Avatar
 
Join Date: Jul 2018
Posts: 127
In the garage:
Reputation: 0 hatuey is on a distinguished road
Location: Los Angeles

United States




Default Re: Need help in diagnosing this clunking from the rear axles / diff

Quote:
Originally Posted by Kieffer87 View Post
How many miles are on your car/axles? I went down this road last year as well and I can't say I made much progress. I replaced the diff cover/bushings, while I was in there I confirmed there is zero play in the diff itself. Next I moved to the axles, I did find the inner cv joints of my axles had a bit of play in them. I ended up buying another set with 30k miles on them. That seemed to help but the clunk/play is still there as shown in your video. I also re-greased the driveshaft cv joint which again seemed to help for awhile.

Based on my experience, I don't think you have any immediate issues that you need to start replacing parts. But if you've got time and money to burn, I'd start with the axles, driveshaft cv joint and diff bushings. Be sure to properly torque the front diff bushing bolt.

EDIT: For reference here was my original post http://www.m3forum.net/m3forum/showthread.php?t=538264

While I mention the "m-clunk" is gone in that post, after a few track days and ~10k miles later it's back.
Funny. That was the last thread I had perused trying to learn about this. But I have to say, I'm a little disappointed in myself for not watching that video. Argh. Which is exactly the video I had been searching for, most I was coming across were people moving in the shaft toward the diff.

But that thread is where I saw the term rotational and actually started making some sense to.

So in that thread, is what I have then called diff backlash?

But to answer your question. Just bought the car a few months ago and there are 157000 miles on it. Diff fluid was changed by the previous owner and some bushings. Not quite sure, there are some receipts I have and been meaning to add them to spreadsheet so I can refer to it easier.

But good to know it's not an immediate concern, I have plenty of those already, makes sense I shouldn't go looking for gremlins.

Thanks all, but will put this on my todo list for later and will probably go through your thread again to absorb it better.
Jump to top hatuey is online now   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 04:38:51 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
M3Forum.com and M3forum.net is in no way sponsored, endorsed or affiliated by or with BMW NA / BMW AG or any of it's subsidiaries or vendors.
BMW and M3 (E90 M3 | E92 M3 | E93 M3 | E46 M3 | E36 M3 | E30 M3) are registered trademarks of BMW AG.
M3Forum Terms of Service
Copyright 1999-2017 M3Forum.com
Discussing e46 M3 Special Tool Rental thread 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)