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      07-30-2013, 01:51 PM   #1
deepfriedbutter
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drivetrain clunking noise [video]

Hey all,

Just seeing if I can get any input and hopefully a resolution to this noise I've been experiencing. I believe it could be the drive shaft since it seems to happen when going from a stop to accel or accel to decel. Please watch the video and let me know what you think. Any help is greatly appreciated.



Thanks!
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      07-30-2013, 04:12 PM   #2
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Quote:
Originally Posted by deepfriedbutter View Post
Hey all, Just seeing if I can get any input and hopefully a resolution to this noise I've been experiencing. I believe it could be the drive shaft since it seems to happen when going from a stop to accel or accel to decel. Please watch the video and let me know what you think. Any help is greatly appreciated.
Couldn't hear anything ... don't know which sound you were referring to. There was a metal noise as someone was taking a hammer to a metal nothing associated with the driveline. May be a pebble is stuck in one of the rear wheels.
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      07-30-2013, 04:14 PM   #3
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Quote:
Originally Posted by aussiem3 View Post
Couldn't hear anything ... don't know which sound you were referring to. There was a metal noise as someone was taking a hammer to a metal nothing associated with the driveline. May be a pebble is stuck in one of the rear wheels.
That's the noise. I am assuming driveline because it only makes the noise when the load on the driveshaft changes from accel to engine brake. It also only makes the noise when in gear.

I've checked the wheels and unfortunately there isn't anything there.

Thanks for the reply
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      07-30-2013, 04:18 PM   #4
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could be a transmission mount, or differential mount, or subframe... will need to get the car up in the air to find out
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      07-30-2013, 04:19 PM   #5
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Quote:
Originally Posted by deepfriedbutter View Post
That's the noise. I am assuming driveline because it only makes the noise when the load on the driveshaft changes from accel to engine brake. It also only makes the noise when in gear.

I've checked the wheels and unfortunately there isn't anything there.

Thanks for the reply
That's very strange. Sorry cannot help.
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      07-30-2013, 06:02 PM   #6
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thanks for the replies everyone. I guess I will get it in the air ASAP.

Still open to other suggestions!
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      07-30-2013, 07:40 PM   #7
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exhaust banging.
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      07-31-2013, 12:35 AM   #8
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Wink Take a good look at your diff

I think one of your diff bolts might be broken due to a bad worn out bushing. I am pretty sure if you take a good look at your diff it might be sitting a little slanted to one side. The diff bolt on my M3 broke 5 times . Everything you say your car is doing mine did the samething. I am pretty sure this is going to happen to everyone with a E9X M3 down the road as the diff bushing get worn. Take a look at this thread

You will see pics when and everything I had to do to fix my problem.

http://www.m3post.com/forums/showthr...=843389&page=4
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      07-31-2013, 06:56 AM   #9
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I have this noise too. I'm going to check my diff out...
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      07-31-2013, 07:14 AM   #10
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Talking Good call on checking your diff

Quote:
Originally Posted by gambitx28 View Post
I have this noise too. I'm going to check my diff out...
My M3 is a 2008 and I don't track my car. I am just glad all the times my stupid diff bolt broke it did not do any real damage to the car but some people are not so lucky. All I recommend to everyone with a E9X M3 that is getting up there in age to keep a eye on your diff bushing because its going to happen because it caught me off guard. Once you hear the clunk and thump when you accelerate and decelerate just go on ahead take a good look at your diff bolts. Oh one more thing depending on how the diff bolt breaks, it can also damage and break your exhaust mount bracket this has happen to me as well because you will hear the rattle along with the clunk & thunk from the diff.
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Last edited by SHADY1; 07-31-2013 at 07:36 AM.
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      07-31-2013, 07:05 PM   #11
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Quote:
Originally Posted by gambitx28 View Post
I have this noise too. I'm going to check my diff out...
How long have you had this noise?
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      07-31-2013, 07:50 PM   #12
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Please keep us posted.
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      07-31-2013, 08:01 PM   #13
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Quote:
Originally Posted by deepfriedbutter
Quote:
Originally Posted by gambitx28 View Post
I have this noise too. I'm going to check my diff out...
How long have you had this noise?
Not sure. Maybe started 6 months ago. Just thought it was "normal" wearing of the drivetrain.
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      08-03-2013, 01:37 AM   #14
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I have the exact same noise. Couldn't tell if it was coming from trans or diff, but it drives me nuts. Mine doesn't do it all the time though. Going to throw it on the lift tomorrow and check out the diff. For a minute there I thought it was normal till I test drove another m at the dealer and it did not do it. Then I got scared. By the way mine is an 08 with 30k on the clock.

Edit: Just had car on lift and it is definitely not my differential bolts. They are intact and tight as can be. Did not have time to pull exhaust and heat shields to investigate further. Maybe next week.

Last edited by eroc0808; 08-03-2013 at 04:08 PM.
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      09-13-2013, 11:57 AM   #15
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Finally got around to taking the e90 to my buddy at BMW. Here's what he said:

Quote:
Before i deem your driveshaft or rear diff as failing. this would be the first thing to do. The lubricant acts as a damper for shaft movement. again this MAYBE the issue.
Here's a link to the SB:

https://docs.google.com/document/d/1...it?usp=sharing
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      09-13-2013, 12:40 PM   #16
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my car makes the same noise too! but it doesnt do it all the time. i think the guibo/flex disc can be causing the noise too. ill have the car checked next week and ill report back.
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      09-13-2013, 02:56 PM   #17
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I would say the axles/VCs could be to blame but it's usually a more dull thud rather than a metal-on-metal clank when a CV fails. Something to check though.
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      09-14-2013, 11:30 AM   #18
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Well my buddy told me that he had four techs under the car and they all agreed this was the sound. I'm hoping they're right....
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      09-15-2013, 04:08 AM   #19
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Quote:
Originally Posted by deepfriedbutter View Post
Hey all,

Just seeing if I can get any input and hopefully a resolution to this noise I've been experiencing. I believe it could be the drive shaft since it seems to happen when going from a stop to accel or accel to decel. Please watch the video and let me know what you think. Any help is greatly appreciated.



Thanks!
That is the same sound I am getting. Mine doesn't repeat that often, but is almost always present when accelerating and decelerating at slow speeds. The dealership got it on lift and when the rear tires where turned, the same sound would come from the driveshaft in the center of the car. Please let me know if you get a fix:

http://www.m3post.com/forums/showthread.php?t=888161
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      09-17-2013, 04:52 PM   #20
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Quote:
Originally Posted by Mahmood07 View Post
That is the same sound I am getting. Mine doesn't repeat that often, but is almost always present when accelerating and decelerating at slow speeds. The dealership got it on lift and when the rear tires where turned, the same sound would come from the driveshaft in the center of the car. Please let me know if you get a fix:

http://www.m3post.com/forums/showthread.php?t=888161
http://www.m3post.com/forums/showpos...0&postcount=15
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      10-03-2013, 06:15 PM   #21
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Brought the car to the dealer today for routine service. I demonstrated the noise for a mechanic. They have diagnosed it as a problem with the driveshaft. They quoted a price around $1600 to replace the entire driveshaft.
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      10-03-2013, 06:58 PM   #22
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Quote:
Originally Posted by gambitx28 View Post
Brought the car to the dealer today for routine service. I demonstrated the noise for a mechanic. They have diagnosed it as a problem with the driveshaft. They quoted a price around $1600 to replace the entire driveshaft.
You beat me to it. This is also what they told me. it's the driveshaft. I'm going to drive it until I can't stand the noise anymore and then get it replaced. You should be able to source the driveshaft cheaper, if you know the right people.

Jaime
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