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Old 06-17-2007, 06:39 PM   #1
marvxyz1
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Join Date: Oct 2005
Location: Pittsburgh, Pa
Posts: 106
axle ratio 80 GMC

I've been trying to fiond out which speedo gear I need to get my speedometer working. I've found some info on the i-net, but I have to determine what is my axle ratio. With my left back wheel jacked up, and the truck in gear(automatic trans)I had my wife turn the left rear wheel 10 revolutions, my drive shaft turned about 13.9 revolutions. does anyone know
what my axle ratio is??? your help would be appreciated very much. Thanks marvxyz1
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