[urq] Driveline whine

fdekat fdekat at sentex.net
Tue Nov 3 03:46:47 PST 2009

I'd also have to go with the hanger bearing. Especially if the noise is kind
of 'musical', and load/gear independant.  If it is, then the hanger bearing
is on it's way out. 

Real world experience says you can run that way for a while, until it actualy
seizes. Then, not really driveable, as the rubber part is trashed.

Problem is, you can't really 'test' the bearing until you have the driveshaft
out of the car. And if you have gone that far, may as well replace the
bearing anyway!  It's a BMW part, and it's not really expensive.

While you are in there, may as well replace the Ujoint too. Louis-Alain has
found the part number for that..

(more info here: 
http://www.motorgeek.com/phpBB2/viewtopic.php?t=24201&highlight=  )


> Message: 8
> Date: Mon, 2 Nov 2009 19:46:23 -0500
> From: "Louis-Alain Richard" <laraa at sympatico.ca>
> Subject: Re: [urq] Driveline whine......
> To: "'Jim Fleischer'" <jim at almgt.com>,	<urq at audifans.com>
> Message-ID: <BLU0-SMTP567EFEB511F4B45FE4209DCEB20 at phx.gbl>
> Content-Type: text/plain;	charset="us-ascii"

> On a different note.......took her out for a somewhat spirited drive
> yesterday and I seem to be getting a fair amount of driveline noise, coming
> from the front right mostly, but could be both sides or under the car. 
> noticable from inside the car than outside (had someone drive by me.)
> Sounds are dependent on vehicle speed, not engine speed.  Happening in all
> gears, and changes pitch with speed.  Seems to be numerous "jet aircraft
> taking off" sounds.  Fairly inconsistent, but "always there" if you know
> what I mean.  The brakes don't seem to be dragging (no excessive heat
> buildup) and no cv boot leaks.  Before I dive underneath, any thoughts on
> where to look? I seem to remember now that someone mentioned maybe
> with the driveshaft, but can't find the post.  Any help?  Anyting in
> particular to look for if it could be the driveshaft?
> ****** Center shaft bearing is a likely culprit, as well as the u-joint,
> a bad bearing in the gearbox will make that kind of noise too. Brady's UrQ
> show that noise in 2nd and 4th gear, but not in the other gears. Also could
> be your parking brake cable "equalizer" that rubs on the driveshaft...
> Louis-Alain

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