tow/haul button

[Don]

I could tell the difference when I was using the tow/haul in my 5. 9, but I can't tell any difference in the 6. 7. Am I missing something or perhaps the button isn't working?

Don

 

[RustyJC]

In tow/haul, shift points are raised on acceleration, and downshifting is more aggressive on braking - the harder you brake, the more aggressively the transmission will downshift. The latter is especially noticeable with the exhaust brake activated.



Rusty

 

[JGilbert]

I could tell the difference when I was using the tow/haul in my 5. 9, but I can't tell any difference in the 6. 7. Am I missing something or perhaps the button isn't working?

Don

I've noticed that also. Coming from a 6. 7 '08 where when you punched the tow/haul, it seemed to lock out 5th gear and the revs went up immediately. Now, the 6. 7 '12 when you punch the button not much changes. I've noticed that about the only change other than the EB is a bit more aggressive is that the shift points are changed.



Joe

 

[Okie-Go]

This is my first auto in a while. Try it with tow-haul on and then switch it off while pulling a trailer, to me that is the easiest way to tell the difference. There is a difference! Going to the auto from the 6 spd manual took some getting used to.

Okie

 

[Don]

Thanks. The shift points and EB make sense.
Don

 

[Cummins12V98]

Run with them both on at all times. Turbo, trans and EB willall last longer. I wish mine would stay on all the time.

 

[rwitt]

Run with them both on at all times. Turbo, trans and EB willall last longer. I wish mine would stay on all the time.

I think you can have the dealer program the ebrake to stay on, or defaults to the last setting when the truck was last turned off.

Rich

 

[RonD]

Tow Haul also sets the trans for higher pressure at times, it will cause the trans to downshift on down hills, as far as always driviing in TH, I don't care for the way it acts when empty, towing it's the best, always on, but empty I do always use the exhaust brake, just try setting it and see how you like it.