Gear ratio calculator (a very good one)

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80broncoman
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Gear ratio calculator (a very good one)

Post #1 by 80broncoman » Tue Aug 03, 2010 11:06 am

http://www.grimmjeeper.com/gears.html

It can keep you busy for hours.
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Cool23
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Re: Gear ratio calculator (a very good one)

Post #2 by Cool23 » Tue Aug 03, 2010 6:39 pm

V8's are great but Six Inlines Just Fine. Cummins Advert.

The link to my project on this forum http://fordsix.com/forum/viewtopic.php?t=41598

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Re: Gear ratio calculator (a very good one)

Post #3 by JohnMcD348 » Sun Feb 27, 2011 12:03 pm

Strange. I entered the information and compared the difference between my stock 235 tires and if I had the optional 31" tires on my 92 Bronco. It showed a decrease in RPM at sped of just over 100rpm with the larger tires. The decrease in rpm should account for a minor increase in economy but from what everyone has told me in the past, the 235/15 rubber that's on my Bronco is the best possible size option to have on it. Would the added weight of the 31" negate the minor decrease in rpm on an otherwise healthy engine?
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Re: Gear ratio calculator (a very good one)

Post #4 by wagon » Wed May 25, 2011 7:57 am

80broncoman wrote:http://www.grimmjeeper.com/gears.html

It can keep you busy for hours.

Thanks mate! Very handy utility.
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Re: Gear ratio calculator (a very good one)

Post #5 by rbohm » Tue May 14, 2013 7:56 pm

8) i have all that on a spread sheet.
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Re: Gear ratio calculator (a very good one)

Post #6 by jjacallen » Tue Jul 02, 2013 1:29 am

Those are pretty fancy... If you just want to try out a couple of different rear end ratios and/or tire sizes, here's a real simple one that I made.

If your tranny isn't represented here, just PM me and I'll add it in for you.

Jalil's Super-Simple Ratio Calculator

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Re: Gear ratio calculator (a very good one)

Post #7 by hillpuller300 » Mon May 26, 2014 10:32 am

This is a very handy tool. Was able to plug in numbers to figure out my rear axle ratio also. I got lost day-dreaming of better fuel economy. :thumbup:
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