Author Topic: Gear ratio and tire size calculator  (Read 3596 times)

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helipilot77

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Gear ratio and tire size calculator
« on: Feb 20, 2013, 05:08:19 PM »
Okay guys here is a calculator that I made on Excel. It allows you to enter in gear ratios for each transmission speed, transfer case speed, differential ratio, and then tire size. Then it tells you engine RPM and speed in MPH for each. The default setting are for an R-151f transmission with dual transfer cases with 4.7 gears in one, but everything is editable. Hope this helps. Thank Big mike for helping me get this uploaded.
-1987 SR5 4runner, 1KZ-t turbo diesel with mech. pump
 & custom 3" S.S. dump pipe, R-151f transmission, marlin dual ultimate transfer cases w/ triple shifter, SAS, 35's https://board.marlincrawler.com/index.php?topic=98969.0
-1984 SR5 Tercel 4wd wagon bone stock - given to my nephew https://board.marlincrawler.com/index.php?topic=100547.0
-1:10 scale RC 4wd crawler w/yota axles, R2 2 speed enclosed dig tranny and 1st gen 4Runner body by BigBird
-My front axle service write-up http://board.marlincrawler.com/i

22rMudToy

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Re: Gear ratio and tire size calculator
« Reply #1 on: Feb 22, 2013, 11:02:21 AM »
Sweet this is exactly what i was looking for :beerchug:
1980 long bed p/u. Spartan lockers, 4.10 gears,
s, 261 cam, Redline Weber 38, K&N air filter, 2.5in exhaust with glasspack. 300 watt amp, 2x12in kicker subs, 2 tweeters, 2 5x7 sony xplodes/

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helipilot77 [OP]

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Re: Gear ratio and tire size calculator
« Reply #2 on: Feb 23, 2013, 08:08:55 AM »
I had been looking for one everywhere without any luck. So I made one and had to share it. Thanks again big mike for helping me get it uploaded.
-1987 SR5 4runner, 1KZ-t turbo diesel with mech. pump
 & custom 3" S.S. dump pipe, R-151f transmission, marlin dual ultimate transfer cases w/ triple shifter, SAS, 35's https://board.marlincrawler.com/index.php?topic=98969.0
-1984 SR5 Tercel 4wd wagon bone stock - given to my nephew https://board.marlincrawler.com/index.php?topic=100547.0
-1:10 scale RC 4wd crawler w/yota axles, R2 2 speed enclosed dig tranny and 1st gen 4Runner body by BigBird
-My front axle service write-up http://board.marlincrawler.com/i

BigMike

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Re: Gear ratio and tire size calculator
« Reply #3 on: Mar 11, 2013, 10:57:18 AM »
:eye: :eye:
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H8PVMNT

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Re: Gear ratio and tire size calculator
« Reply #4 on: Mar 11, 2013, 07:13:25 PM »
That thing is fun thanks!
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