Speedo not reading correct km's

[Scully74]

Pulled the dash apart to clean out all the red dirt, when it was put back together all electrics work fine, took for a test drive but found that the speedo is out by 15km's. Looked in workshop manual in the forum but didn't help. Can someone let me know how to fix this as i don't want to get court speeding..

[Billie]

Did you touch the speedo needle? Maybe remove and refit the speedo cable, make sure theres no kinks in it.

[Scully74]

Didn't touch the needle at all, have checked the cable and no kinks in it..

[Billie]

Have you put different wheels on it?

[Brayden]

There is no calibration with these speedometers, so the 'fix' will be to find the part that is broken or not plugged in properly.

Excluding the gearbox end there's only a couple of moving parts involved: The cable, and the drive/worm gears inside the speedo.

[Scully74]

thanks guy's, have not changed the wheel size, will have a closer look at the cable connections tonight..

[Scully74]

Had a look at the speedo, all looks fine, tried disconnecting and reconnecting, but it's still out by 15km's..any ideas