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727 Speedo Gear in '69 AMX |
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Rebel Machine 
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Joined: Jul/03/2007 Location: Western Il Status: Offline Points: 1461 |
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 Topic: 727 Speedo Gear in '69 AMXPosted: May/19/2012 at 5:03pm |
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What speedometer gear would be correct for a '69 AMX speedometer (140 MPH) and 727 auto trans? Got 3.54 gears and 255 60 15 tires.
Currently has a 32 tooth gear and speedo reads nearly 10 MPH too high.
Thanks,
-Steve-
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scott
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Joined: Jul/10/2007 Location: United States Status: Offline Points: 952 |
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Posted: May/19/2012 at 6:40pm |
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Assuming its 10mph high at 60mph, the speedo is 15% off. To slow the speedo down, you need a gear with 15% more teeth. 32 X 1.15 = 36.8 Or, a 37 tooth gear. Double check my math, I am not a math whiz.
Edited by scott - May/19/2012 at 7:02pm |
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