Originally Posted by SBT83

The dashes came in 8v and 16v forms 8v the more desirable. Both types have a switch on them which changes the readings for tyres size variations on the back of them. The transponders to the gearbox are wired with 3 wires iirc. 1 is the signal. But you can by pass using the transponder if you can find the signal wire from the car and wire to the signal from the dash. I believe the signal is a green wire from memory. The speedo will always be slightly out especially at high speeds with large wheels. I have a diagram of the wires also but a google search will sort you out. They are a piece of piss to fit tbh. There are about 4 earths from the back of the dash that you can join and run to earth.

Originally Posted by rs clint

i will ask retro manta see if they can shed some light on it