Crawl Ratio Calculator (for Wrangler TJ/YJ)
Transmission
Axle gear ratio
Transfer case ratio see note 1
Tire diameter (inches) see note 2
Calculated crawl ratio
Calculated speed at 750 RPM (ft/sec)
Notes:

1. Rubicon transfer case ratio is actually 3.93:1 so this value is used in our calculations.
2. To convert metric tire sizes to diameter in inches, try our tire size calculator here