21.5 tooth speedo gear…

matteo

Registered User
So I used the speedo gear calculator, and it told me I need a 21.5 tooth gear. Should I go with a 21 or 22? Anyone know where I can get one of these two gears? I heard something about having to get one from GM…
 
Well, you can get the 21 tooth directly from Ford, and it will be less likely to break/wear out than the 22 tooth. So, I'd choose the 21 tooth.

-Rod
 
68COUGAR said:
Why is that? What is inherently wrong with a 22 tooth speedo gear?

Confused 68COUGAR

The more teeth there are on the gear, the finer the teeth are. The finer the teeth are, the easier they wear out. I've seen quite a few complaints on the boards from those who have tired using 23 tooth gears, saying that they only last a few thousand miles.

-Rod
 
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