I have a 1986 Vanagon GL with a weird Odometer problem.
The Gear and shaft that the Odometer wheels ride on Migrates out and
drops a little. It is Very Apparent on the Odometer, since the nubmers
have visibly moved back away from the faceplate on one side.
Last time I fixed this, Last year, December, I roughened up the shaft
with sandpaper where it engages the last wheel. That worked until
Recently. Now it is doing this migrating thing again, and the sandpaper
track lasts about 2 days. Eventually I will pony up the $120 for the
local Speedo show to rebuild it.(This is the shop recommended by my
Mechanic, whom I trust implicitly)
Since we have been having 100 degree weather here, I am wondering if
this has something to do with it.

My Main Question is for anyone who has been inside this speedo.
Is there a little piece of plastic, screwed into the frame that prevents
this gear from migrating? There was one in there, last time I repaired
this, but it looked like a kludge, and I left it out. I can fab another
one, and I may just to stop this problem.

Any Ideas?

Thanks All,
Matt