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Marv829
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Join Date: Nov 2006
02.21.2009, 10:46 PM

Quote:
Originally Posted by skellyo View Post
Can anyone verify the gearing for me? It looks like this is what it has:

Diffs: 3.307 (43:13)
Tranny: 2.697 (44:18, 32:29)
Pinion/Spur: 20:44

Total Gear Ratio out of the box: 19.628:1

I have the tires at 6.3". Putting all that into the calculator gives me a speed on 4S of 31.09mph. That sounds a bit low, are my values correct?
Hi, I have the following:

Diffs @ 3.307 (43:13)
Trannny @ top drive gear to first idle gear 2.444 (44:18)
Trannny @ second idle gear to output gear 0.906 (29:32)
Spur-Pinion @ 2.200 (44: 20)

For a total ratio of 16.109

With 14.8v, 2200kv and 6.3" tire the math for that combo is ~37.9mph

Where our math differs is the second gearing stage of the tranny.
I see the 32T gear on the idle shaft driving the 29T gear on the output shaft. Which means it would only take the 32T gear 0.906 of a revolution to turn the 29T output gear one full revoultion.
   
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