slologo Calculators
 Crawl Ratio or RPM/MPH
Tables
 Tire/Gear/RPM table

  Gear Ratio also solve for MPH or RPM
Tire Diameter:   Transmission Ratio:
Diff Ratio:   Transfercase Ratio:
RPM:   MPH:
  Crawl
  
  Ratio

GEAR RATIO CALCULATOR

This calc can be used to find any missing value.

 .If your tires are bigger than stock you either guess at the actual MPH or do something like count the seconds between mile markers on the highway while maintaining 60 on the speedometer.  If you know your gear ratios and tire size you can get a fairly close number using this calculating tool.  Fill in all entries except the one you want an answer to in green section only.
 If you'd like to find your overall crawl ratio, enter the Diff/Trans/TransfCase ratios. 

Formulas used

(RPM X tire Diameter)
-------------------------------------------=MPH
(Diff. ratio x Trans ratio x Transfer case ratio x 336)
and
Diff. ratio x Trans ratio x Transfer case ratio =crawl

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