speedo swap

[Aussie John]

Anyone know if an early Griff speedo is the same as a late model S?

[BIG DUNC]

All Griff speedometers have an electronic speed sensor input.

By early Griff, do you mean the Stuart Warner gauge which has "zero" in the One O'clock position?

When I was looking around for a second hand one of these, I did find some for sale that looked the same but had cable drives. I assume these came from a late S or a late Wedge.

The 350 i that I used to own had a cable drive. I suspect that the S's did as well, but don't know for sure.

[phillpot]

Early S's were cable drive but soon changed to electronic. Possibly when 2.8 engine was superseded by the 2.9 ?

[Aussie John]

Thanks guys, a mate is looking at exchanging with a late S speedo which is electronic, his speedo is one which is smaller diameter than later ones.

[lancepar]

Not sure if this helps or hinders.

https://www.ebay.co.uk/itm/Tvr-Speedometer-and-oil...

[phillpot]

Aussie John said:

Thanks guys, a mate is looking at exchanging with a late S speedo which is electronic, his speedo is one which is smaller diameter than later ones.

Another little issue, some speedo's are 4 pulse and some 8... it may read twice or half as fast unless it matches the gearbox transducer

[BIG DUNC]

That looks like a bargain. Also looks identical to the one in my early Griff, even down to the wiring plug.
Tempted to buy it myself in case I need it in the future, but won’t unless you (OP) that it is no good to you.

[Aussie John]

Yes, that is the one my mate is buying, thanks for all the help, where would we be without Pistonheads, cheers, John.

[BIG DUNC]

Looks like that will be the correct one for your mate then. Snap it up quick.

[lancepar]

There was another further down the listing for 80GBP that looked in better condition. Looks like thats gone to a new owner as well 'cause I can't find it now.

Edit: Found it..........

https://www.ebay.co.uk/itm/TVR-SPEEDOMETER-BE/1428...

Edited by lancepar on Thursday 2nd January 11:09

[Hoover.]

had mine upgraded by Speedycables … kept the old housing, speedo starts in the same place just with a digital milometer.

The old ones run off the gear box... the newer/refurbed ones run off a sensor on prop shaft (I think from memory)