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Author Topic: Speedometer gears  (Read 1218 times)

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Offline pintoguy76

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Speedometer gears
« on: August 15, 2013, 02:49:59 PM »
I swapped my 6.75" rear for an 8" rear but didn't get the speedo gear from the donor car. The 6.75 had a 3.55 ratio and the 8 has a 3.00 ratio. Tires are stock size. What gear do i need and where can I get it?? I dont even remember what color the gear is now or what color the donor cars gear was.
1974 Ford Pinto Wagon with 1991 Mustang DIS EFI 2.3 and stock Pinto 4 Speed
 
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Offline Billnparts

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Speedometer gears
« Reply #1 on: August 19, 2013, 02:44:53 AM »
The speedo gears are in the trans. How far off is the speedometer reading at 60? Increasing the number of teeth on the gear at the end of the cable will slow down the reading. Conversely, reducing the number of teeth will increase your reading. Basically, the change of one tooth will indicate a change in your reading of apx. 7mph.


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