This is a great tool for anyone looking to go to bigger tires that is worried about the possibility of having to do a gear swap.

I remember where the Liberty ran at highway speed before on the Tach (1900rpm) with stock tires and with the 4.56's and 35's it will be within 20Rpm which should bring me back to the 20MPG range woo hoo

Keep dreaming of 20mpg's with 35" tires.You'd need 5.13's or 5.38's to compensate for the tire weight and added vehicle weight.I run 5.13's and that's not low enough with 35" tires(5.38's would have been better),couldn't imagine having 4.56's and what my trans would look like after 100 miles .

You want to be closer to 2700-3000rpm's at highway speed to get the best mpg's out of the 3.7 that's been that modified,that's where it starts making it's peak power.

Dreams are what I'm made of my friend