Originally Posted by t230

i may be wrong but this is how i see it - the mtx75 uses the speed sensor for the speedo as when i disconnect mine the speedo doesnt work - im then guessing the gearbox you used originally also had a speed sensor? if so just match the connector for the speed sensor - you may and probably have to look at wiring diagrams as they will be different - hopefully the fiesta , if it has a speed sensor originally , will also be 3 pin...that all may be wrong ...hopefully someone can shed light?

Originally Posted by studabear

Mk3 fiesta still a speedo cable?

My mk4 escort will have the speedo working with a MTX75 from a Focus RS later in spring.

We have made a box that takes the signal from the gearbox speed sensor and via a raspberry Pi computer it controls a motor attached to the speedo cable. Fully tested on the bench and fully calibrate able via Smart phone.