If MPG was an issue going 35s is trouble. Gears will help but you are kinda locked in on street 35s. just to get to wall mart must be some rough roads.....
Exactly this
35’s bring terrible fuel economy to a JK and the first generation JK is slightly worse than the second generation about this.
Stock gearing with 35’s means awful fuel economy.
Deeper gearing with 35’s improves the fuel economy but is still pretty bad.
Stop and go traffic is where 35’s especially kill fuel economy. It’s not the steady 65 mph.
Since your Jeep is already lifted and already has 35’s, then deeper gears can only be an improvement to what you are currently getting.
Some people think of it strictly by rpm’s but that is incorrect.
I don’t think we are supposed to post links anymore on this forum for some reason even though that used to not be the case.
I use a site called 4LO which has several calculators and makes it easier to make a decision.