The Ford Barn

160B · 08-03-2017, 10:10 PM

FWIW

If your speedometer is not indicating an accurate MPH, first check to see if the odometer is indicating accurate miles.

If the odometer is accurate than the problem is in the speedometer calibration.

If the odometer is not correct then the drive gear at the driveline or overdrive is incorrect.

Change the drive gear and then check the indicated odometer and indicated MPH, if both are correct problem solved.

If the odometer is not correct, wrong gear, change to correct gear, when you get the correct gear and the odometer is correct and the indicated MPH is not correct than you also have a calibration problem.

The odometer is a direct drive and there are no adjustments other than installing the correct gear.

The indicated MPH can be adjusted in the calibration process.

I hope this helps

08-03-2017, 10:10 PM	#11
160B Senior Member Join Date: Aug 2010 Location: Port Orchard, WA Posts: 1,498	Re: Speedometer drive gears FWIW If your speedometer is not indicating an accurate MPH, first check to see if the odometer is indicating accurate miles. If the odometer is accurate than the problem is in the speedometer calibration. If the odometer is not correct then the drive gear at the driveline or overdrive is incorrect. Change the drive gear and then check the indicated odometer and indicated MPH, if both are correct problem solved. If the odometer is not correct, wrong gear, change to correct gear, when you get the correct gear and the odometer is correct and the indicated MPH is not correct than you also have a calibration problem. The odometer is a direct drive and there are no adjustments other than installing the correct gear. The indicated MPH can be adjusted in the calibration process. I hope this helps __________________ 1931 160B & 1931 68B If you don't have time to do it right the 1st time, how do you have time to do it the 2nd time? Last edited by 160B; 08-03-2017 at 10:19 PM.