Re: Changing final drive ratio on a 2012 JGC 5.7L
The WK2 has so called metric gears. Doesn't seem to be anyone making them. Every once in a while folks try to get a group buy together but it never seems to pan out.
The 5.7 axle ratio is 3.47. The SRT8 has a 3.7 ratio and ELSD. You could think about swapping entire axle assemblies. Dunno of anyone thats done it.
The V6 has a 3.07 ratio. In 2014 there were some changes.
2011 WK2 Overland Mineral Gray/Black, Advanced warning, V8; 2009 KK Rocky Mtn V6; 2000 WJ Laredo I6; 1979 CJ7 I6... green... miles of smiles :)