Gearbox speedo drive

[simon]

Hi Guys
I've carried out a search but not found what I need, but I'm sure it will have been covered here before.
I have a electronic speedo and have had no end of bother with the pick up point. So I'm hoping to take the pick up off the gearbox drive rather than the driveshaft.
Assistance would be much appreciated.
Drew

 

[Tim Terry]

Hello, Simon. I can't help with the gearbox drive, but can recommend the GPS speedo from Speedhut. Works like a charm: https://www.speedhut.com/gauge/GR4-GPS-06/1/GPS-Speedometer-200mph

 

[Jim Cowden]

What sort of gearbox.
Is it an inductive pick up or hall effect.

What is the issue?

jim

 

[Eric A.]

What gear box do you have? Not all transmissions have a mechanical speedo drive.

 

[simon]

Yes that's an important point it's a Un1. Not sure on the type of sensor but it can pick up on bolt heads.
The gap between the bolt heads on the drive shaft is not constant so intermittent reading.
It looks like the speedometer cable is held in with a spring clip .. Where can these be purchased please.
Thanks again
Drew

 

[Ian Anderson]

I have a UN1 in the Gt40
i used 2 magnets araldited to the outside edge of the inner cv adaptor
a pickup senses the magnets passing And sets up pulses.
the speedo converts the pulses into a reading.

i got everything from ETB

ETB Speed Sensors

Speedometer sensors

www.etbinstruments.com

ian