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3.90 gears question


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  • 2 weeks later...

I don't know what its off of, but jason sold me the diff from his old d50 that had 38 teeth on the ring and 8 on the pinion. Thats 4.75

that is not how it works, you have to calculate the circumfrence of the center of contact points between the 2 gears. Teeth per gear means nothing. You can change the diameter and shape of those 8 & 38 gear teeth and still get by with 8 teeth on the pinion, but a completely different ratio.

 

Tooth count can only be useful if all 3.55's are known to be X, 3.90's to be Y, and 4.22's to be Z, then you can compare tooth count.

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Um, actually that is how it works, number of teeth on the ring gear divided by the number of teeth on the pinion gear gives you the ratio. As an added note, one of the two gears will always have an odd number of teeth and the other an even number to prevent a wear pattern from occuring.
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  • 2 months later...

count your pinion teeth again, I bet you have a 4.222 with 9 pinion teeth and 38 ring gear teeth. 38/9=4.222

 

common,... seriously?

 

you think I cant count to 8?

 

I cant count to 37 jesus give me a little more credit than that.

 

Seriously though I must have counted the first tooth twice, its 37/8 = 4.625

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common,... seriously?

 

you think I cant count to 8?

 

I cant count to 37 jesus give me a little more credit than that.

 

Seriously though I must have counted the first tooth twice, its 37/8 = 4.625

 

If you can't count to 37, why should I believe you can count to 8?

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