Joseph,
When my odometer stopped, it was the hub on the left front wheel that was the
problem.  There is a little square pin that fits into the hub, and on mine it
had stripped.  I drove for about a year and a half like that and finally
fixed it.  It cost about $4.50 from a junkyard.  Rule this out before
anything else.  As I recall, you can see it by popping off the hubcap.

Disclaimer:  This was a decade or so ago, so I may be remembering the details
wrong.  I do remember, however, that it was very easy to see how the thing
worked.
Peter

In a message dated 10/15/01 6:54:20 PM, Joseph_P._McNiff@FFIC.COM writes:

<< Hi all,
My Odometer stopped working, also trip counter at the same time. My
mechanic says its $200. He says they take it out of the dash and take it to
someone esle to fix one of the gears that is broke inside. My question is
how hard is it to take out the instrument cluster from the dash. And has
anyone been able to fix this themselves.
 >>