GaryGus wrote:
Have one, with 4.10 gears. Traded a 2009 Dodge 3500 dually with diesel and 3.73 gears in on it. Tow a HitchHiker LS with a scale-checked trip weight of 13,200 pounds. Have towed to Central Coast of California and also to Lake Tahoe from Central Valley. The 6.4 will tow circles around the 2009. Easier to drive, better on grades. But, it is thirsty. About 8 mpg towing. I changed because I was hired of diesels after 2 of them and I do not tow as much nor as far as I did.
8mpg! IDE take that every time. The newer diesels won't get you much more than maybe 10.
I don't see any 6.4's come in at work with issues (I'm a Mopar tech). The biggest issue is the exhaust manifold bolts. And those are far easier to remove than the Ford 5.4/6.8 Tritons.
I think you'll be happy with it.