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post #1 of 6 (permalink) Old 03-08-2008, 01:54 PM Thread Starter
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where to buy speedo gears

I'm putting 355's in my 91 sport,the speedo gear calculator at sccoa site says I need a 22 tooth gear but I only see them as large as 21.My tires are 235/60/15.If I put a 21 in would my speedo be off by a great deal?Thanks
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post #2 of 6 (permalink) Old 03-08-2008, 05:22 PM
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I know you need the orange gear, not sure how many teeth it has though.

Moving to Drive Train.

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post #3 of 6 (permalink) Old 03-09-2008, 12:21 AM
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With the 21 tooth (purple) gear, your speedometer readings will be off by 4.39% if I've done my math correctly.

So, for instance, at 60 MPH, your speedometer would read 62 MPH.

You can get the gears at your local Ford dealership.

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post #4 of 6 (permalink) Old 03-09-2008, 12:35 AM
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post #5 of 6 (permalink) Old 03-09-2008, 12:40 AM Thread Starter
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Thanks guys,I'll check out ford and throw those gears in.I'm looking forwad to the extra get up and go.
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post #6 of 6 (permalink) Old 03-26-2008, 06:48 PM
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My '93 AOD had a 7 tooth output shaft from the factory. Yours may have an 8 tooth or a 7 tooth. Kinda hard to count with the tailshaft on.
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