Anyone running 3.42 gears?

Looking to see if anyone has swapped 3.42 gears into an 03-07 truck. I'd like to get 3.55 but apparently they don't make them for the aam so this is the next highest gear. I'm looking for better highway mpg and lower crusing rpms, with that being said I'm running 36.5" tall tires and I'm looking at going back down to a 35 right now I do 70 at 2k. Thanks guys





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