Which Speedo Gear
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5th Wheeling
Joined: Aug 2021
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Which Speedo Gear
The previous owner put larger tires on so now the speedometer/odometer is off. The rear axle code is H3 and the tires are 30" How many teeth would my speedo gear need to be in order to get an accurate reading?
Lead Driver
Joined: Jul 2011
Posts: 8,678
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From: On the Edge of the Desert
You have to see what gear it has, and how much the speedo needs to change.
Each tooth makes about a 2mph difference. Subtract teeth to increase speed, add teeth to slow it down.
Each tooth makes about a 2mph difference. Subtract teeth to increase speed, add teeth to slow it down.
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RangerHaywood
1973 - 1979 F-100 & Larger F-Series Trucks
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Aug 17, 2010 08:29 PM
