Is there an easy way to calibrate my gauge cluster?

[Jacque Strapp]

The previous owner of my 2001 GTS had the APC indiglo gauges installed on it, and I think whoever put them on reattached the gauge needles incorrectly: the speedo needle doesn't move off of zero until I am moving at at least 5-8 mph, and it feels like 70-75 when my speedo says I'm doing 80. Is there a way to find out how fast I'm actually going, short of setting the cruise control at 60 and seeing how long it takes me to go 10 miles or whatever? I Was thinking of having a friend pace me in her car.

[Maelfyn]

Trial and error :) I like to do it while the car is moving. Having an s-afc sure helps because you can see your RPM according to your ECU then just plop it on your dash while you have cruise control on. Speedometer is more difficult. Find out how fast you are going at 3k rpm in 5th gear from a GT-S buddy.

[tool462]

I stole this from the Indiglo Gauges for GT install on the Installs page:

With the gauge hanging, turn on the ignition to the acc position. Wait for 20 seconds and the gauge cluster should calibrate itself. Speedo and tach setting now is calibrated to be at zero. Replace the needle , making sure it points to zero. Gently push the needle back on. Note: do not handle the needle by the arm. Hold it at the black plastic center while doing this. Turn off the ignition. Wait 3 minutes and turn it back to acc position. Needle should move as the gauge calibrate itself and then fall back to zero. If needle does not fall back to zero, carefully remove the needle and repeat this procedure again until needle show zero after calibration.