i seen the only loaded down 6.4 in this months diesel power mag. the guy had to order it loaded with the 6 speed man and go from nebraska to indiania to pick it up my choice would be 6 speed manual with 4.10 and go 33 or 35 tires to knock it down to round 3.91ish the best gear ratio out there

 

i would base it on your needs.....if you are a big tow guy (i mean heavy stuff) i'd go manual, and like mentioned the manual isent even guna be available for '10 model year so snag them up if you can.....if your accident prone, there was a good point made there too, however with some finese any one can drive a stick injured.......and for HP purposes, your pretty much guna need to build a tranny at any rate. i like the auto, but that is ust what i prefer.