I have a 06 2500 2wd club cab with a hemi and it has the tow pakage. I am going to be going from Nashville to Charlotte N.C. through the mountains pulling a big 5th wheel camper and I want to make sure what I should use and when. It has the haul tow and the O.D lock out. So which should I use going up the mountains and down the steep inclines. I have driven that route several times but never hauling a camper. This is my first time hauling a camper. Thanks in advance for the help this is a great web site. oh yes it has a 7.73 rear end

 

OMG!! LOL

when on steep inclines and pulling a good load you can push the button for the haul/tow and this will help you climb easier

 

And for the really steep hills, push the Tow/Haul button twice. That you will be in 3rd gear (direct drive) and let the engine get into its powerband.

 

^^^^ Not sure how yours works but press mine once and it take it out of OD, press is again (2x) and you will go back in OD. Maybe you got something crossed somewhere???

 

On my 06 I push that button once and it kicks out the OD hit it again and the tow-haul light comes on I supose I should use the tow haul up and down them mountains