Originally Posted by BigJohnson14
So I don't know much about the gears and howe they affect the MPG's or performance so I am lost when it comes to that. I definitely want it big and think 6-8'' lift is where I want to be. Still not sure if 35's or 37's will look best. I know lifting it will decrease my MPG's that is why I am looking at ways to help off set it. Anyone using and programmers that work well?
Essentially you want lower gears (higher number) to turn your tires easier. For example 3.21 gears will turn the crown gear (and the tires) 3.21 times for ever 1 turn of the pinion gear (connected to the driveshaft). 4.56 gears will turn the crown gear 4.56 times for every 1 turn of the pinion. Think of it like a bicycle. Using the small gear on the front ring (on the pedals) and the big gear on the wheel makes it a lot easier for you to pedal the bike up hills and such. Same kind of idea...
Sounds like the 6" RCX kit with Bilsteins at 2.1" and a 1" rear coil spacer would be a good set up for you to achieve that height (8.1" lift)
With that kind of lift you're definitely going to want 37's too. 35's will look to small. With only a 6" kit you could get away with 35's but if you want to go 8" 37's for sure!
There aren't any tuners out for the 2013's yet. But both Diablosport and Bully Dog are the most popular tuners for the 4th gen Rams. When they release their tunes for the '13's I'd definitely recommend getting one. My Bully Dog increase my MPG about 2 MPG with the stock wheels and tires.