[jlb27537]

Dave, your fuel mileage is what I am getting on my '12. What it costs to delete, you will not recover in fuel savings. Finding a delete tuner is getting tough and expensive.

When I got my state inspection, they looked under it to see if all the stuff was there. (Harris county) Bought new in Missouri, tagged in Tx.

I run 1,600 @ 60 mph with my 3.73 and yes it will downshift on some grades, but it gets better fuel economy in 6th. We have tow/haul options. It keeps it in a lower gear longer when accelerating and down shifts earlier on hills to keep the speed up to prevent lugging.

Need to remember the 2010 had 650ft/tq @ 1500 and the 11/12 had 800 ft/tq @ 1600 so that will make a bit of difference. Both are 350hp @ 3013 rpm's

http://www.cumminsdieselspecs.com/67.html

Jim