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Old 11-26-2008, 06:11 PM
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61RANCHERO 61RANCHERO is offline
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Speedometer Gear Selection

I am swapping rear ends from a 4.0 rear ratio to a 3.5 ratio, I have a Fordomatic 2-speed and need to know what speedometer drive gear to order.... How many teeth?

Thanks!!

Glenn
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Old 11-26-2008, 07:20 PM
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Here is a good calculator. You will probably need a 20 tooth gear.

http://www.tciauto.com/Products/Tech...eedo_gears.asp
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