A 2wd speedo is driven off of the left front wheel and says '801' on the
bottom, which refers to the revolutions per mile, IIRC.
  The 4wd speedo is driven off of the differential and says '1600', which
means that it turn's about twice the speed to indicate the same amount of
movement.
  I tested a syncro speedo head in my regular vanagon, and it indicated half
the miles and speed at any given time. (driving at 60 mph actual speed read
as 30 mph on the guage).

HTH,

Mike B.

----- Original Message -----
From: "Wesley Pegden" <wes@CS.UCHICAGO.EDU>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, February 19, 2008 7:19 PM
Subject: Re: WTB: Syncro Speedo

> Just  out of curiosity...
> what is the difference between a syncro and regular speedo?
>
> -Wes
>
>
> VW Doka wrote:
>> Anyone got a MPH syncro speedo for sale?  Working or not.
>>
>> Cheers,
>>
>> Jeff
>>
>>
>