Tow Haul mode

[shooters]

Ok guys. Here is one for ya. It may sound dumb but here it goes.

I'm wondering if anyone knows if it's safe, or even recommended to turn the T/H mode OFF when your towing or hauling a load, when you get up to say 60-70mph on an open road?

Anything to save a little on fuel.

[Tom]

if it doesn't shift back and forth from 4th to 5th and back to 4th again...I say go for it.

[Hoss350]

I tow about 11,000 pounds, and if I'm on a flat surface, steady speeds, I will turn the button off, even a little upgrade is okay, as long as you don't feel the truck really luggin bad, or shift every two seconds. As soon as I hit any kind of steep grade going down or up, I turn it back on, going down because you want to use the engine braking.

[shooters]

Okay but as far as you know does it screw up the tranny in any way doing that?

[Hoss350]

I'm not a diesel or tranny tech, but I know when something is working within it's parameters, and the only difference the tow/haul does is, keep it in lower gear so it stays in it's power band, and doens't overheat the tranny or motor. So as long the tranny doesn't shift a hundred times in 2 seconds, in my opinion it does not harm it. But again technically I'm not a tranny or diesel tech, so maybe someone else will have a different opinion.

[shooters]

Is that 11k in addition to the weight of your truck or 11k combined weight?

[Tom]

11k would be his trailer weight.

I think he's got a pretty large towable.
-T

[Hoss350]

yeah , that's my trailer loaded to the gills, with fire wood, quads, water, fuel, etc.

[shooters]

Damn that's a load!

[powerboatr]

we are at 14k loaded just the trailer
which is 120 over, groceries are heavy