first and simple thing to check is where the speedo cable is driven in
the left front wheel bearing dust cap.
Square speedo cable there, square hole.
It's a Classic VW thing for that spot to wear and not drive the speedo
cable reliably.

otherwise possibly speedometer head.

btw....here's another one that always could stand being done..
remove instrument cluster..
wheich means undo speedo cable anyway .
while turning  left front wheel with your foot ( van jacked up on the
left front ) feed lube into the top of the speedo cable .

that helps a lot with smoothness of speedometer cable rotating,
quietness, and longevity.

On 8/17/2015 4:19 PM, Eric Caron wrote:
> Hi folks,
>
>          I’d love some tips concerning a new strange problem with my speedometer.  this troubling behavior just started on our recent weekend trip.
>
> During the trip the speedometer needle indicating speed which sometimes not move.  the other indicators like miles on the trip counter and mileage would keep working.  then for no apparent reason the needle would start to work again and according to my GPS it was correct.  Every now and then it would just stop working, often after the van had been at a stop.
>
> Can anyone tell me what might be going wrong and if there is something I can do to make the speedometer healthy again.
>
>
> Eric Caron
> 85 GL auto Westfalia
>