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Re: [T3] Speedo Needle?


On 25 Mar 2001, at 20:36, Strex wrote:

> Can anyone explain to me why my speedo needle vibrates ... It seems to be at
> the correct speed but shakes everywhere..

This means that something is causing the speedo cable to catch 
once per revolution and that this something is probably closer to 
the top end of the cable than to the bottom. This leads to a non-
constant angular velocity of the speedometer shaft as the top end 
goes "stick-slip" even though the bottom end is turning uniformly.

This problem can be in either the speedo itself or in the top end of 
the cable, or it can be a poorly installed cable. You can reach 
under the car and pull on the cable housing where it comes out of 
the LF steering knuckle. Push it in and then pull it out; it should 
move about 1/4". Leave it about midway between.

If this doesn't help, then disconnect the cable from the speedo and 
turn the speedo input shaft with a small screwdriver or a short stub 
cut from an old speedo cable. It should turn completely freely. If it 
does not, then the problem is in the speedo. You can try to fix it, 
but this can be tough and you are likely to destroy your first 
speedo repair attempt.

If the problem is not in the adjustment nor in the speedo itself, 
replace the cable.

-
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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