RE: [alfa] Vibration in rear under acceleration

["Jeff Greenfield" <alfaguy@xxxxxxxxxxxx>]

John -

This is one of those where I'm going to say: "they all sort of do that on
occasion".

Most common thing to check are the transmission mount, driveshaft center
support, and u-joints.

In order to check the u-joints properly, you need to remove the rear half of
the driveshaft (8 bolts, mark it to the flanges first) and check to see if
either of the joints is starting to bind. One or both probably are. Spider
u-joints seem to last about 40,000 miles.

I've had some cars that seem to always do this on occasion and was never
able to completely eliminate it.

YMMV,

Jeff

-----Original Message-----
From: owner-alfa@domain.elided [mailto:owner-alfa@domain.elided] On Behalf Of
Johnathan Beltz
Sent: Tuesday, April 27, 2004 1:41 PM
To: alfa-digest@domain.elided
Subject: [alfa] Vibration in rear under acceleration

On a recent drive, I noticed that under hard acceleration in
1st gear in my '91 Spider that something would start to bump
around in the drivetrain.  It seems like it's coming from
the rear of the car.  It doesn't make much noise, except for
possibly a low-pitched thumping.  More obvious is the
shaking vibration felt while sitting in the car when it does
it.  I'm guessing its a bushing or bearing or something, but
any likely canidates on what to check for first?  The car
has about 43k miles on it.

Thanks,
Johnathan
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