Haha Bye

Ok so I get the notorious vibration coming from under my car and start the list of things to check off for possible candidates.

Its not the center drive shaft mount (I just had it replaced)
It not either flex discs (I checked them both while changing CDS)
Its not exhaust mounts (Checked them too)
Its not sway bar brackets or mounts (Checked as well)

The sound is a kind of clunking coming from directly under my right arm and i can even feel it on the arm rest. It happens under load while im driving and also when I hit a bump.
P.s. it get faster with speed which suggests a moving part.

The possibilities left...
Universal mount on the drive-shaft
Rear Transmission mount
Something axle related
Rear diff mount...

Im lost... are any of those on the second list very common?
Thanks in advance

julesandtrish

Your problem sounds like a bad guibo. Here is a thread with more info that I hope helps.
Bad Guibo

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-Julian

Haha Bye

thats the flex disc I was talking about. I checked both of them and they are both ok...thanks though

julesandtrish

Ooops. I've added that term to my vocabulary. Hope you find an answer soon.

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-Julian

gsfent

OK, I will admit to my ignorance. I am only aware of one flex disc, up at the front of the driveshaft. Where is the second??
Regards,
Jerry

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'01 Black/caramel
Dinan Stage3 suspension and CAI, SS jet coated headers, Evosport UD pulley kit, IATS, PC Gold 93, open brake ducts, Hamann front splitters, TEC cupholder, Euro tilt/slide armrest, 6k HID fogs, 6k super white low beams, V1/Stealth1, 2.65 diff w/40% lockup/2x dynamic, Rogue custom SSK and tranny mounts, ST 355 BBK (fronts), BP sway bar brackets, Bluetooth retrofit

Haha Bye

there is one between the transmission and driveshaft and I thought I saw a possible second one between the driveshaft and diff... May be mistaking

richie_rvf

Did you check the center exhaust bushings?

Item number 6 (you need 2) here;

http://www.realoem.com/bmw/showparts...75&hg=18&fg=20

Beemer Guy

It would be helpful when posting questions like this to include the mileage on the beast. I would suggest that it sounds like driveshaft universal joint problems.

Take it to a good shop that can put it up on the lift and diagnose it properly for you.

Michael

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2003 LMB M5 R.I.P. 01/02/08
2008 Jet Black 335 Coupe (replaced the M5)
2002 Slate Grey 911 Cabriolet

andy777

I am having a similar problem but mine is not drive shaft related because I only get a thud when going over a bump which sometimes can be felt through the armrest. Like you I have checked everything possible and replaced parts which me and my mechanic were sure was the cause.

Haha Bye

Right ...its sooo annoying. I have a 50K+ beast so these rubber parts are showing it. Richie rvf, I actually saw those rubber bushings while i was under there and they looked to be a bit collapsed or sort of tilted to the right permanently. Im gonna replace those and the rear tranny mounts, then Ill give updates.

emccallum

You didnt mention why you had the center bearing replaced? If it was b/c of this problem and it didnt fix it, then you may have a bad driveshaft causing premature failure of the center bearing. Driveline is a company that has a good reputation for rebuilding BMW driveshafts, plus they have a great warranty. Also, check your tranny mounts.

If you have access to a good safe lift you can run the car in the air and look to see what is moving...an out of balance rear wheel can mimick this symptom.

E55AMG2