I'm looking to trade my truck in on a dually,and i'm having a hard time finding one with a nv5600.I tow about 13,000 lbs.50% of the time.I test drove a g56 and felt like I needed 7th gear.Towing that much weight would I be better off with an auto or A g56?Thanks.

 

My G56 is very comparable in ratios to my powerstroke auto I just sold. It would turn about 2100 at 70MPH and the G56 turns about 2175-2200 at 70MPH. Both trucks have 3.73 gears.