how would mileage and driveablity be effected by switching from 3.55 to 3.07 gears in a 1998 4.0 cheroke 2wd

 

I can't give you a definitive answer but it has a lot to do with how and where you drive. Do you drive mostly city driving? Hilly areas? A lot of weight in your jeep? Stock tires? I would say if you did mostly highway driving, and it was pretty flat and running street tires you might gain maybe 1 mpg I am guessing 2 at the most but if you pay for new gears and pay someone to do it, it would take awhile to see the payback.

 

My guess is a little worse. The engineers got it figured pretty good for the best combo of economy and performance.

 

Thanks fella's 90% of my driving is street 10% hunting/mud ,planing a long trip out west and trying to figure how to get the most out of her. Every thing is stock and plan to put a possi in this spring.

 

x2

 

That's just not allowed in a Jeep.....possi is a Chevy thing.