Calibrating Speedo

[Sam_Vt5spd]

Yo, I have put a lower ratio Diff on my manual VT exec and now need to recalibrate the speedo.

What options do I have?

[VH commodore]

u should be able to take it to a mechanic, i know using our scan tool at work u can calibrate the speedo with it.

[Jesterarts]

If your in melbourne and in particular the SE suburbs... Dr Bob

[Sam_Vt5spd]

what cost would I be looking at taking it to a mechanic?

[88GreenVN]

what cost would I be looking at taking it to a mechanic?

Edit - wrong thread - sorry

[VH commodore]

ok so found out how to calibrate the speedo on vt's...not sure it it will work for all vt's as mine is a berlina so has the 3 windows at the bottom of the dash, trip meter average fuel etc....ok so key in ignition if off position hold down mode, turn key to ignition on, let go of mode and thats it use the arrows to calculate it up or down. u'll have to have some idea how far it's out at 100kph tho