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Thread: Gear Ratio on Overdrive Pinion/Ring gear set?

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Old 08-08-2020, 08:02 PM   #1
Rock Crawler
Join Date: Jun 2008
Location: Mudville
Posts: 947
Default Gear Ratio on Overdrive Pinion/Ring gear set?

Looking for the gear ratio spec on the overdrive set of gears.

Isn't it pinion divided by ring tooth count? Or is it the other way.
Been too many decades since I thought about this stuff. lol

I think it is about a 3.37:1 ratio, but figured I should ask.
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Old 08-09-2020, 07:38 AM   #2
I wanna be Dave
Join Date: Sep 2011
Location: Douglassville, PA
Posts: 3,445
Default Re: Gear Ratio on Overdrive Pinion/Ring gear set?

You are correct. Ring gear/pinion gear.

OD: 27/8=3.375
Stock: 30/8=3.75

((3.75-3.375)/3.75) *100 = 10% overdrive
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