wayoflife

running the same tires on our 2012 rubicon with 4.10 gears now and get about the same. the new 3.6 pentastar is really nice - much better than the old 3.8 which wouldn't deliever anywhere near the mpg performance given an apples to apples comparison.

ddhowel

How does the 2012 with 4.10 gears and 37s compare with the older 3.8, 5.13 gears and 37s on power and acceleration, if you have a comparison.

This the main reason my 2012 is still stock and my garage is filled with all the gear off of my 2010.

wayoflife

trust me, there's no comparison. the 2012 with 37's and stock 4.10 gears spank a 2007-11 with it's wimpy 3.8 running 37's and 5.13 gears. power, performance and mpg are all better across the board on the 2012's.

sclan

KM2s are good for your purpose

wayoflife

for lasting a long time, i would totally agree. km2's do well as a nice agressive mt that'll give you about 60,000 miles. when it comes to mpg, an at like a falken will still do way better.