GQ PATROL SPEEDO SENSOR

Morning all,

Possibly some gq tech guru can help me out here.... I own a GQ ute and wagon, the ute has normally 16inch wheels and the wagon 15inch, i have transferred the wheels between the two cars which has thrown out both speedos, the ute now reading fast and the wagon slow. My orginal plan was to switch the different speedo gears to solve the problem but alas when i looked underneath gone is old technology and in with the new.......a electronic speed sensor.

So the question comes down to a few points

- How do these electronic speed sensors work (nothing in the book about them)
- How are they calibrated or is it a satndard unit between all models
- If i switch the two speed sonsors is it going to have the desired result

I thought i would ask the question before i go draining gearbox oil. Anyone with ideas, your comments greatly appreciated

cheers, crowe