re. Wheel bearing question

[Ben Swann]

I know that the wheel bearings for the 4000 quattro's are different diamter and thickness for front and rear - I would expect the M80's to be different too.

 A virbration or occillation could be caused by a number of things, starting with wheel/tire out of round, runout or imbalance.  Loose bushings or tie-rod ends may contribute to viration - play will be noted when wheel lifted off the ground and some serious force applied.

A bad wheel bearing typically does not cause vibration, but more of a noise similar to that of a propeller airplane,  increasing in volume with speed and worsening progressively as the bearing goes south.

Ben

[Date: Mon, 25 Oct 2004 09:26:38 -0500
From: "Alexander Lee" <thomas_three at hotmail.com>
Subject: Wheel bearing question
To: quattro at audifans.com
Message-ID: <BAY10-F49itVGeSJIEo0000064d at hotmail.com>
Content-Type: text/plain; format=flowed

Greetings,

My mechanic told me that I had a bad bearing on my '89 80 Quattro.  It 
sounded like the rear ones to him, so I order one.  In the interim, he had a 
motorcycle accident and another guy at the shop pulls the wheels and 
determined that it's the front one.  He puts the rear bearing that I ordered 
on the front.  Is this acceptable?  Or is the wheel vibration that I hear 
and feel above 65 attributed to the switch?  Or, is the vibration due to the 
fact that i'd recently had the wheels aligned prior to the bearings being 
put on and need to get it aligned again?

Thanks,

Thomas Alexander
'89 80Q
'96 Avalon
'89 T-Bird SC]