I just bought an 2007 2500 6.7L CTD

I bought it to pull with obviously but what gear should I run?

I did pull my rig about 500 miles last week and just left it in D (6 speed auto) with tow haul on.

Just don't want to kill my trans.

Here's what I pull


Note pulling this at 65 - 75 mph it downshifted to fifth twice I believe other than that it locked out 6th gear.

 

What kind of terrain? If it's flat, OD shouldn't be a problem. If you're in a particularly hilly area I'd pop the OD off. I've never had the luxury of a CTD but I haven't blown up my tranny yet by following that strategy.

 

I have a 5.9 with a 4spd, but Tow Haul mode is what you are looking for. It has a more aggressive shift pattern, and it should allow full use of all your gears when appropriate.

 

Yes I run with Tow haul, which is awesome combined with the exhaust break I don't think I'll ever wear out a set of pads

I'm in Michigan we have some decent hills but no mountains, like I said it did downshift to 5th on a couple hills but other than that it chugged up then in 6th.

Had the cruse set at 68 mph

 

I want an exhaust break.. <waaa!>

 

Lets see the truck!

 

The best picture I have of it right now.

 

So anyone else have this truck and tow? Just wanna be sure that 6th gear is ok to tow in...

Thanks for the input guys

 

Seems to be doing well in 6th gear so far just had the trans serviced (60K service) and the dealership said it looked new inside.

 

Putting it in D and going is fine. Tow/Haul will take it from there. I used to worry as well with my last diesel, but that is what it is built for and with the diesel backing up the tranny your truck won't be gear hunting when you hit an icline.