Yes, the speedo drive gear inside the Syncro front diff is known to
fail. The gear is made of plastic. It can be removed and checked or
replaced without dismantling the front diff. There is a small roll pin
that holds it in place. You need to clean the area well enough to see
the hole for the pin. Then use a thin punch to drive the pin out enough
for the gear/drive assembly to come out. Gears with different numbers of
teeth were used to adjust for different tire and gearing  options.

Mark

Andrew Wilder wrote:

>Hi! I have a problem with my speedo which doesn't work.  The instrument itself works, the speedo cable has been renewed and works and is properly mounted.  I can only imagine that the drive on the front differential isn't turning.   Has anyone else had this problem?   Is there a part which can be renewed or does the whole differential have to be dismantled?
>regards,
>Andrew Wilder,
>
>