speed reading

[Apex]

has anyone had a speedo that is inaccurate in its speed reading, its at least 50% out. any help would be appreciated. the offender is a 2.1 petrol syncro. 1987 carvelle.

[silverbullet]

I would take a guess at the speedo drive in the front diff starting to fail, although they tend to sieze the speedo gear shaft and shred the nylon driven gear.
Can't think how it would read so far out though.

[silverbullet]

Unless the speedo has been doctored? My 2wd SA had a kph speedo with an mph face put on it... it read a long way off!

[Apex]

yea seems strange, just been informed by my son that it only reads 25mph max, new something was up when he passed me in a 50mph limit and I was clocking 55 !.

[CovKid]

Can be worse, driving along at 70, white knuckles and brown pants, convinced you're going to die, when actually you're doing 25 with a queue of traffic behind.

[Apex]

I think the next question would be did vw fit speedo's and rev counters into a 2.1 petrol syncro carevells in 1987? if not someone has and not very well.

Only ever had brown pants in a Syncro, when it went through an iced up river in Scotland!

[silverbullet]

Speedo and tacho swap is VW Lego. Syncro mph speedo should have "1600" marked on the face. If its another number like "805" then its a 2wd one. But that would make it read double speed if fitted to a 4wd.
Or would it? Confused myself now...