I believe it was only in 2007 I notice Dodge was offering 3.42 gears in the 6-manual diesel trucks. Does any one have a truck with these gears? If so, how is you performance and mileage? I was thinking about changing my gears out for the 3.42s.

 

When I ordered my 2007 with the G56 manual transmission, the only gearing available was 3.73:1. As far as I know, nobody makes any gears for the AAM 11.5" diffs other than 3.73 and 4.10.

 

Here ya go, a set of 3.42 gears!

Just Differentials

 

Ive got 3.42's on my '08 G56, mileage is still rough as there is only 4k on it. On the highway, the lie o meter says 17mpg at 70 mph. I think I'm pulling 1800 rpm @ 60 mpg but not sure cuz Ive got 285's on.