Ratio Possibilities:
Stock Transfer Case Functions: 1. With the Rubicrawler installed in any Jeep, The Normal two wheel drive feature of your Jeep does not change. The city or rural road handling of your Jeep is the same as it was the day you bought the Jeep.
Stock Transfer Case Functions with the RubiCrawler in High Gear:
1. Rubicrawler in high range and the transfer case in four wheel drive high range (all Jeeps). The gear ratio of the transmission does not change. This feature gives you power to all four wheels.
2. Rubicrawler in high range and the transfer case in four wheel drive low range (non Rubicon Jeeps). The final gear ratio with the transmission in any gear is reduced 2.72 times lower. This feature gives you power to all four wheels.
2a. Rubicrawler in high range and the transfer case in four wheel drive low range (Rubicon Jeeps). The final gear ratio with the transmission in any gear is reduced 4.0:1 times lower. This feature gives you power to all four wheels.
Stock Transfer Case Functions with the RubiCrawler in Low Gear:
1. Rubicrawler in low range and the transfer case in two wheel drive (all Jeeps). The final gear ratio with the transmission in any gear is reduced 2.72 times lower. This feature does not give you power to all four wheels, but provides slower speeds and more throttle response for easy trail use. The nice feature of this is that you have more torque and better handling.
2. Rubicrawler in low range and the transfer case in four wheel drive high range (all Jeeps). The final gear ratio with the transmission in any gear is reduced 2.72 times lower. This feature give you power to all four wheels and provides a shift on the fly option for four wheel drive. The New Process transfer case can be shifted into high ratio on the fly; so if you're in sand, mud or offroad trail and need power to all four wheels this is a great option.
3. Rubicrawler in low range and the transfer case in four wheel drive low range (non Rubicon Jeeps). The final gear ratio with the transmission in any gear is reduced 7.40 times lower. This feature gives you power to all four wheels. This is an extreme crawl ratio that provides a slow controlled approach to an obstacle.
3a. Rubicrawler in low range and the transfer case in four wheel drive low range (Rubicon Jeeps). The final gear ratio with the transmission in any gear is reduced 10.88 times lower. This feature gives you power to all four wheels. This is an extreme crawl ratio that provides a slow controlled approach to an obstacle.
Ratio possibilities with a - Stock New Process 231/241 are a 2.72:1 and a 7.40:1
Stock NP Rocktrac are a 2.72:1, 4.0:1 and a 10.88:1 Atlas 2.0 are 2.0:1, 2.72:1 and a 5.44:1
Atlas 3.0 are 2.72:1, 3.0:1 and a 8.16:1
Atlas 3.8 are 2.72:1, 3.8:1 and a 10.44:1
Atlas 4.3 are 2.72:1, 4.3:1 and a 11.70:1
Atlas 5.0 are 2.72:1, 5.0:1 and a 13.60:1