Here are a few to get you going. Be sure to get overhaul/master install kits and not regular installs...

https://www.jk-forum.com/forums/show...8112-It-begins....
https://www.jk-forum.com/forums/show...?82262-Gearing

 

When do you start losing the bottom end as you move into 4s and 5s or does first keep the low end strong

 

Open the FAQ's at the top of this modified area and look at the rpm charts in the drivetrain section. You will see that you really can't over-gear these jk auto's. (for a laugh, pick a ratio and tire size and compare an auto to a manual).

 

Thanks

 

Ya my dad owns a midas so I've got lifts access to things at cost as well . He also has a car wash so easy washing the keep ha but thanks for the advice I've been told I can get to around 16 mpg which would be awesome and thanks for those links just need to find a place to out the parts any advice ??