Axle to Speedo Transducer - Anyone ?

[the moosehunter]

Hi

Just on the off chance does anyone know of a Griff owner who may have had a the later diff fitted to an early car ?

Mine has a 2002 rear axle and yet runs the earlier dials being a 92 model. I don't want to change the dials over and as such I am in need of getting a transducer (I have been informed) to convert the speedo pick-up signal to match the clock

On the off chance others have already been here, it may save me some hassle

Unlikely but you never know

Any tip/hints appreciated

Cheers

[shpub]

You don't need a transducer you need something that takes in X pulses and sends out Y pulses where X and Y are the different number of pulses. Failing that get it recalibrated. A lot lot easier and cheaper.

[jonnyb]

Send the clock to speedy cables, they will put in a calibration board. Then you can set it to the correct speed. It costs about £60 +p&p

[the moosehunter]

jonnyb said:

Send the clock to speedy cables, they will put in a calibration board. Then you can set it to the correct speed. It costs about £60 +p&p

Cheers Jonny

Would that be the Speedy Cables in Swansea ?

Will they need the sender and gearbox / final drive /tyre info aswell

Have you had this mod done yourself ?

Will give them a bell tomorrow

Thanks again

[jonnyb]

the moosehunter said:

jonnyb said: Send the clock to speedy cables, they will put in a calibration board. Then you can set it to the correct speed. It costs about £60 +p&p Cheers Jonny Would that be the Speedy Cables in Swansea ? Will they need the sender and gearbox / final drive /tyre info aswell Have you had this mod done yourself ? Will give them a bell tomorrow Thanks again

Yep, Speedy cables in Swansea.

They shouldn't need the info but if you give them a call then they should tell you. I have had the board fitted to my speedo as it was over reading by quite a margin (when doing 80 on the motorway my speedo thought I was doing 130!) What you need is someone with a GPS and a small electric screwdriver to set it while you drive along.

This is all assuming that the speedo works but reads incorrectly. And what you have done is move the toothed wheel from the prop-shaft to the drive shaft by fitting the later diff.

[the moosehunter]

jonnyb said:

when doing 80 on the motorway my speedo thought I was doing 130! This is all assuming that the speedo works but reads incorrectly. And what you have done is move the toothed wheel from the prop-shaft to the drive shaft by fitting the later diff.

80 MPH !!! Surely that's above the speed limit ??

I happen to have a GPS think I could even find an electrical screwdriver aswell. So well within my realms of engineering.

Speedo should be working fine, and yes it's purely the pick up point for the sensor that has moved as a result of the new diff, and it would bend the speedo needle if I connected it.

I'll give them a call today and see what they say

Cheers


>> Edited by the moosehunter on Friday 6th January 08:49

[shpub]

Yes the tooth wheel has moved but the number of pulses that represent one revolution of the road wheel has also changed. speedy will need to know that as well all the drive train ratios and wheel sizes etc.

[the moosehunter]

Steve

Would you happen to know the two numbers concerned for the pick up

I can obviously crawl under the motor to check the new diff but don't know how many pulses the origonal '92 diff had

Do you also know if the wiring the same for both ?

Cheers

Andy

ps Homemade Wilwood brake set up (as per other thread) being fitted tomorrow. Will take some piccy to show the outcome.

[shpub]

'Fraid not. The wiring should be similar but I can't remember if they are both 2 or 3 wire sensors or a mix.

[jonnyb]

shpub said:

but the number of pulses that represent one revolution of the road wheel has also changed.

Typical! Nothings ever that easy is it.