Jay and to the rest of you-

Thanks for your suggestions about fixing my odometer.  I had attempted to
repair my odometer the day I slid off the road as I had posted to the list.
Aside from the slide, I did not fix my odometer, it was still frozen.  Sunday
afternoon, I pulled the speedo/odo unit out again.  Again I found the spindle
turning freely as well as the plastic gear that engages the worm gear.
Luckily, I didn't have to open the housing or the speedo face place to do
this.  To repair this, I pinched the pointed end of the spindle as hard as I
could with a pair of pliers to keep it from sliding through the housing.  On
the other end, I epoxied the crap out of the plastic (or is it nylon gear) that
fits on the spindle and engages the worm gear.  I waited until the epoxy set (I
broke the speedo arrow as well and had to epoxy that too).  I reinstalled it,
tried it out and hooray, it worked!  Now to tackle my '86 Jetta's odometer...

Thanks again all!