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Open Roads Forum  >  Tow Vehicles

 > Tow Haul Mode

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afidel

Cleveland

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Posted: 12/07/20 10:36pm Link  |  Quote  |  Print  |  Notify Moderator

BB_TX wrote:

I engage tow/haul as soon as I hook up the 5er no matter the distance, speed, or terrain. And I use tow/haul descending some steep winding grades even without the trailer behind. Less need to use the brakes.


I basically use it whenever I drive my truck. The fuel economy tuning of the regular transmission shift pattern makes the 355HP 5.3 feel more gutless than the 123HP in my Vibe or the 175HP mated to a CVT in my Subaru. I very infrequently drive my truck unloaded, but it still makes me have a twinge of guilt over the worse fuel economy but that's overriden by the truck not being an absolute dog.


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NRALIFR

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Posted: 12/08/20 04:16am Link  |  Quote  |  Print  |  Notify Moderator

I’ve seen some rental units where tow/haul was on by default. You could still turn it off if you didn’t want it, but it was on at every engine start.

I would bet you could have a dealer tech do the same if you wanted.

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DustyR

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Posted: 12/08/20 07:06am Link  |  Quote  |  Print  |  Notify Moderator

BB_TX wrote:

I engage tow/haul as soon as I hook up the 5er no matter the distance, speed, or terrain. And I use tow/haul descending some steep winding grades even without the trailer behind. Less need to use the brakes.


x-2

Welcome to the world of 'transmission grade braking'. Couple that with an engine brake and drive with ease. Modern technology has helped the towing public greatly.


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Cummins12V98

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Posted: 12/08/20 07:13am Link  |  Quote  |  Print  |  Notify Moderator

Start truck, engage both. Good for the Turbo, good for the trans. Keeps engine in a good rpm for no lugging/downshift acceleration. Oh yea brakes last forever.


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IdaD

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Posted: 12/08/20 09:04am Link  |  Quote  |  Print  |  Notify Moderator

I run TH and EB most of the time, although I don't generally run EB this time of year because I don't want to be in the habit of putting it on when it's below freezing every night. EB and ice isn't a good combo.


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Grit dog

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Posted: 12/08/20 09:25am Link  |  Quote  |  Print  |  Notify Moderator

phillyg wrote:

I activate tow/haul when accelerating and decelerating, but I find I can deactivate it at speed on level ground with no headwind. If the trans shifts out of OD I know it's time to activate it again.


FWIW, there’s no need or benefit to disengage it. Your truck will go into top gear in tow/haul and maintain it until it needs to downshift.
But doesn’t hurt to switch in and out either if that’s what you want to do.


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Cummins12V98

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Posted: 12/08/20 01:58pm Link  |  Quote  |  Print  |  Notify Moderator

IdaD wrote:

I run TH and EB most of the time, although I don't generally run EB this time of year because I don't want to be in the habit of putting it on when it's below freezing every night. EB and ice isn't a good combo.


Where is your sense of adventure???

shelbyfv

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Posted: 12/08/20 02:42pm Link  |  Quote  |  Print  |  Notify Moderator

I think engaging tow/haul will also keep a good charge going to the trailer battery.





Edd505

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Posted: 12/08/20 05:48pm Link  |  Quote  |  Print  |  Notify Moderator

IdaD wrote:

I run TH and EB most of the time, although I don't generally run EB this time of year because I don't want to be in the habit of putting it on when it's below freezing every night. EB and ice isn't a good combo.


EB exhaust brake?


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Cummins12V98

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Posted: 12/09/20 03:25am Link  |  Quote  |  Print  |  Notify Moderator

shelbyfv wrote:

I think engaging tow/haul will also keep a good charge going to the trailer battery.


I will have to think about that one!

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