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Re: Quattro Digest V2 #449

From: "Graydon D. Stuckey" <graydon@apollo.gmi.edu>
Date: Thu, 21 Sep 1995 09:45:26 -0400 (EDT)
Subject: Re: 4wd Mechanics

On Thu, 21 Sep 1995, David Kavanagh staff wrote:

> > system.  Lets take that one step further, and build a hollow crankshaft,
> > and run the front driveshaft up the middle!!  That would allow the engine
> Graydon, do you realize what you are saying? Just think about the crankshaft
> for a moment and you will realize that this is impossible!

It is not impossible, just think about bearing journals with big diameter
e.g. 5-6" and an offset of 1.5" for a 3" stroke. There is enough overlap
that you can run through a shaft. The rotational inertia would be high

From: steveb@newkla.kla.com (Steven Buchholz)
Date: Thu, 21 Sep 95 07:19:15 PDT
Subject: QTC/other quattros?: Drive-shaft axial bearing number

> Well, I looked in my toolbox this morning and found that I kept the
> original axial bearing, so I am quite certain that I have the right
> number :)
> The original bearing was made by INA with a part number of: 6006RSR
> The replacement was made by FAG and had a few more numbers on it (at
> least the box had more numbers):
> 	6006.2RSR.T.C3
> BTW - for those of you who do not know this already, even though
> Audi considers the unit to be a single replaceable module and thus
> will not sell repair parts, I have found it to be quite rebuildable,
> with parts readily available.  I posted a rebuild procedure quite
> some time ago but I haven't seen it in the archives as yet.  Send
> me direct e-mail if you would like a copy.  Caveat ... this was
> done on an '83 QTC, but from looking at the driveshaft on the '88
> 5000 it looks like it may still apply, but YMMV.

Later cars had the yoke carrier welded to the prop shaft, so you can not
just unbolt and replace the bearing.

Peter Orban
National Research Council of Canada
Internet: peter.orban@nrc.ca