RE: [tech] Wheel Bad Vibrations...

[Jonas Karlsson <jkarlsso@metabolex.com>]

Sean, 

Whenever there are vibrations that are specific to the speed-of-rotation 
of the wheels, look at the things that are rotating with the wheel. 
Axle, rotor, wheel, hub, bearing, CV's.  Now think of which of these 
would have been damaged in the lovely encounter with that MFing pothole. 
Most likely the wheel or tire, but you say that the shop said it 
balanced out fine. I don't think the rotor or hub would have been 
damaged by the pothole, that leaves bearing, axle, and CV's. The axle 
doesn't really take a lot of stress during the shock of a pothole, 
neither the CV. But the bearing sure does. Is the vibration more like 
oscillations (like an unbalanced wheel, 5-10 beats per second) or more 
like a constant vibration that shakes the interior panels etc. The 
latter could be symptoms of a bad bearing. If so it should get worse 
with time (i.e. louder). 

Jonas
85 Scirocco


Sean Martin wrote:
>
>
>
>Ok so in all this crappy slush and snow I managed to hit the 
>mother
>of all pot holes.  I developed a bad vibration around 80kph.  I 
>took
>it into the tire shop where I got my tires last month and they 
>did a
>little balancing and what not. Said that it should be ok, the 
>wheel
>wasn't bent or anything.  But....no dice....its still shakes 
>pretty
>bad.
>
>What are the other possibilities?  Bent a-arm, ball joint, wheel
>bearing?
>
>Sean,
>87 8V
>
>
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