The recent VW parts list I saw listed different control units for a 90
Syncro versus a 90 2wd.

90 Syncro 443 907 305
90 2wd    251 907 305

Mark

Raimund Feussner wrote:
> Hmmm, that could be a reason, but:
> All Vanagons use the same control unit, no matter if 2WD or syncro.
> On the other hand, a unit that works with half the impulses will also
> work in a syncro with standard impulses. So 4WD wouldn´t matter
>
> I used the 443 unit on a 2WD, but I can´t remember if it started working
> at higher speeds only.
>
>
> Regards
> Raimund
>
>
>
> mark drillock schrieb:
>> I wonder if the 2wd Vanagon uses a different control unit due to the
>> speedo cable driven speed sensor only spinning at half the speed that
>> it does in the VW cars. Syncro speed sensors turn at about the same
>> speed as the cars. What type of Vanagon did you have?
>>
>> Mark
>>
>