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Hottarod,

I know your combo is very similar to mine (4.62 gears and a C4). Do you recall what size speedo gear you had to use to correct your speedometer. I've got slightly shorter tires, but I'm just looking for a ballpark idea.

Thanks.
 

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I tried a couple of different driven gears and gave up. I think the closest I got was about 10 or 15 miles per hour off. Its been so long now that I don't remember what color I left in there. I tried to find some kind of conversion formula that would tell what gears it should have but I never found one.
 

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when I went to 4.11:1 I was told that even Ford used some sort of "adapter" that made up the difference on 4.30:1 gears and beyond ...

I don't think anything as simple as a different speedo gear will get you there ... unless there is something new going on that I don't know about ...

God knows that's always possible
 
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