The biggest difference is the speed the cable operates at. On the Vanagon
the cable is driven directly off the tire so the cable is turned at the
speed of the tire. On all the front drive VW's and vanagon Syncros the cable
is driven off a gear set driven by the final drive. Usually it is some great
ratio greater than actual wheel speed. On the Syncro is almost double. I
don't recall the ratios for the other VW. There is a number at the bottom of
the speedometer face indicates the revolutions per mile or kilometer.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Roy Nicholl
Sent: Wednesday, June 1, 2016 3:08 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Speedometer question

Last evening as I was hurrying the Hyena along (125kph) to a dinner
appointment (we were late) the odometer decided it was tired (at only
218,799 kms) and it now sounds like theres a gear slipping internally.  The
trip meter is still running fine.   The three rightmost digits have recessed
back into the odometer body, so I suspect the shaft has slid out of the
gear.

I dislike taking that brittle plastic apart, but it is time to fix the
odometer.

In the event I get in there and it is more serious than just the shaft
sliding out of place, what are the differences between the Jetta/Golf MKI or
MKII odometer and the one from the T25?    From the front, they look
identical.  I have an old MkI speedometer/odometer and wanted to know if I
can raid it for parts (speedometer needle is broken or I would try swapping
it in).

Roy