Flaky Speedometer revisited yet again

["Robert L. (Bob) Myers" <RMYERS@WVNVAXA.WVNET.EDU>]

In the continuing daytime drama of the flaky speedometer, my macanak (can't
spell mechanic) tells me they had to replace a gear in the transmission AND
a printed circuit board in the instrument cluster.  To the tune of $628.
That's one high priced tune.  I'm on my way to pick up the car and find
out fer sure whether its really fixed.  Meanwhile, what's the odds on there
being problems at BOTH ends of the system?  I think I'd better question him
severely about the need for both replacements.  The gear under consideration 
is apparently in the transmission and is what provides the signal to the speed
sensor.  If the pc board is bad they why was the transmission work needed?
If the transmission work was necessary then why replace the pc board?

Bob  __________________________________________________      ^_____^
    | Robert L. (Bob) Myers  <RMyers@WVNVMS.WVNET.EDU> |    /       \
    |__________________________________________________|   (  O _ O  )
            Love M'Audi - Love M'Bimmer.                    \  (_)  /
       Siberian Huskies are better than either!              |  U  |