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Old 09-19-2015, 04:05 PM   #1
wejaz28
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Drive shaft vibration at 28mph

I have a 2001 330I, 180k, car vibrates passing through 28mph, then goes away. Doesn't matter what gear, always 28mph. Intensity increases depending on acceleration load. Can be quite violent under heavy acceleration, especially if I hammer it right at 28mph. Creates a loud thumping noise from drive shaft hitting csb.

What I've done:
Replaced Guibo (No evidence of being bad)
Replaced CSB twice (Was not torn at all)
Replaced C/V at rear of drive shaft where attaches to Diff.
New motor mounts
New trans mounts
Had drive shaft re-balanced (U-Joint was checked. Was deemed good?)
Replaced rear diff bushing at Dealer (Rest of bushings OK)
Checked Trans and diff fluid levels

Video was filmed upside down:






My only guess at this point is the transmission tail shaft is bad or U-joint bad under load only. No vibration at diff in video.

Found several threads similar, not exact.

Any thoughts?

Last edited by wejaz28; 09-20-2015 at 12:28 AM.
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Old 09-19-2015, 10:41 PM   #2
Saintluk2
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upload video to youtube
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Old 09-20-2015, 12:38 AM   #3
wejaz28
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Posted in wrong section. Can Admin move to E46 General

I don't know how to move this post to right section.
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Old 09-20-2015, 09:50 PM   #4
wejaz28
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Any Thoughts?
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Old 09-20-2015, 10:18 PM   #5
franz
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Not ignoring you but that is a stumper!
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Old 09-20-2015, 10:41 PM   #6
wejaz28
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No problem. I have literally read 100's of threads. Figured if I listed all the things that were suggested and I've already done, it would narrow it down to someone who experienced exactly this.

It doesn't look like much of a vibration in the videos, but it is really violent if I jump on it just before 28mph. It really hammers the CSB bracket.

I guess I'm trying to determine if the transmission is involved or its from there back.

Thanks
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Old 09-21-2015, 11:23 PM   #7
wejaz28
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Any word from the drive line guru's?
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Old 09-22-2015, 02:43 AM   #8
Infinitasbeemer
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My money is on u-joint..

This i how my u joint sounded like when on the car.. (when off the car it didnt seem so bad)

https://www.youtube.com/watch?t=1&v=MadTMFJz6Zw
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Old 09-22-2015, 09:15 AM   #9
wejaz28
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My drive shaft is the M3 type. Shaft connects to diff with a C/V joint, which I replaced already.

The propeller shaft u-joint was checked when balanced by driveline shop.

Thank you for posting
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Old 09-22-2015, 10:08 PM   #10
Saintluk2
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That looks bad. The only thing I can think of is the ribs at the middle of the driveshaft were not aligned correctly.
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Old 09-22-2015, 10:21 PM   #11
wejaz28
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Can you elaborate. What type of alignment are you referring to? The 2 halves of the drive shaft to maintain balance?
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Old 09-22-2015, 10:33 PM   #12
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yes, when doing the CSB/Guibo I marked both half shafts with a silver marker before disassembling and made sure they lined up on reassembly.
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Old 09-22-2015, 10:43 PM   #13
wejaz28
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Ok, I get it. I had the shaft balanced at a drive line shop as a whole unit. They painted and marked the halves, although I did not take it apart as I left it bolted together.

Thanks
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Old 09-22-2015, 10:53 PM   #14
Nicker
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obs it's not balanced correctly if there's a problem with it....

like saint said, always mark the driveshaft before taking it apart, even if it's off by 1 spline it'll be out of balanced.

If this is a problem you can try removing it and rotating it by a spline each time and seeing if the problem gets worse or better... or just pick up a whole new shaft from a junker.
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Old 09-22-2015, 10:55 PM   #15
wejaz28
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Did you see my post. I did NOT take it apart after balancing. I have not said that there is anything wrong with the drive shaft.
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Old 09-23-2015, 12:24 AM   #16
Saintluk2
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It's possible the shop reassembled it incorrectly by realigning 1 spline off the mark, though unlikely. Rookies have to start somewhere.
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Old 09-23-2015, 12:36 AM   #17
wejaz28
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I'm a bit confused. They balanced a bolted together drive shaft. I picked it up and installed it in my car. How would any type of spline alignment at that point make a difference if its balanced and not taken apart?
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Old 09-23-2015, 02:38 AM   #18
Saintluk2
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Ahh your transmission is different than mine. I have to disconnect the two half shafts to remove the driveshaft.
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Old 09-24-2015, 04:03 PM   #19
wejaz28
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UPDATE!!!

Well, I pulled the drive shaft down and replaced the Guibo(Flex Disk) with a M3 Disk(Beefier). Figured what the heck. Lo and behold, the vibration was gone!

I also raised the Trans about an 1/8' just to get the alignment just right. (Don't think it made an overall difference, but it was off a bit)

I learned a valuable lesson, I had learned several times before. Don't cheap out on hard to replace parts.

Thank you to all who responded to this thread. All information helped in some way.

Kevin
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Old 09-25-2015, 03:30 AM   #20
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Glad it works, but should work with your oem guibo disk too.
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