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Old 04-22-2014, 10:49 AM   #31
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Forgot to mention the "exhaust braking" on the 6.7....really nice ..when exiting the freeway for stopping

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Old 11-29-2014, 12:21 AM   #32
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I am a transmission tech for a Ford dealer. Tow haul has several benefits for a torque shift 6 transmission. 1. Increases line pressure so when the clutch packs apply it reduces wear on clutches.
2. Modifying shift timing to increase fuel economy and promote hp and torque for optimal towing efficiency
3. Allows for engine braking when going down a grade to help decrease brake lining wear
4. Activation of trailer sway control
I have a 2014 F350, very satisfied with the performance. I haven't seen any internal issues except for solenoid issues and a tcm. Very reliable power train.

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Old 11-29-2014, 08:33 AM   #33
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Always use Tow/Haul when towing TT, regardless of terrain. Computerized transmission keeps the engine revs right in the maximum torque band and greatly increases exhaust brake effectiveness.
"But, oh that magic feeling, nowhere to go." -- The Beatles

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Old 11-29-2014, 08:45 AM   #34
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I use tow mode and manually lock out o/d when it starts "hunting" for a gear. My tranny temp stays steady.

I'm a little too truthful, I guess.
Y'all have fun in "Fantasy Land".
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Old 11-29-2014, 09:16 AM   #35
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Originally Posted by rockfordroo View Post
Here's what my 2009 Silverado's Owners Manual says:

Tow/Haul is designed to be most effective when the
vehicle and trailer combined weight is at least 75 percent
of the vehicle’s Gross Combined Weight Rating (GCWR).
See “Weight of the Trailer” later in the section. Tow/Haul
is most useful under the following driving conditions:
When pulling a heavy trailer or a large or heavy load through rolling terrain.

When pulling a heavy trailer or a large or heavy load in stop and go traffic.

When pulling a heavy trailer or a large or heavy load in busy parking lots where improved low speed control of the vehicle is desired.

Operating the vehicle in Tow/Haul when lightly loaded
or with no trailer at all will not cause damage. However,
there is no benefit to the selection of Tow/Haul when
the vehicle is unloaded. Such a selection when unloaded
may result in unpleasant engine and transmission
driving characteristics and reduced fuel economy.
Tow/Haul is recommended only when pulling a heavy
trailer or a large or heavy load.

So part of the answer is how heavy your trailer is with respect to you towing capability.

My 2011 Chevy Traverse's Manual says the Tow/Haul mode will also increase the alternator output to charge the trailers battery. It also increases the number of blinks the turn signals will make on a brief tap of the lever from 3 blinks to 6 blinks. This doesn't seem to apply to the Silverado, at least not my year..
Have similar manual, I use it full time if the truck starts to shift because of the hills or when in traffic gets backed. On nice level roads my trucks rpms are the same towing as not so the truck isn't working harder than normal and therefore I leave it off. This was how the mechanic told me to do it when I asked and I get a couple of extra mpg on a trip this way. Have your tranny serviced on schedule and ask if you need to have it done more often if you are towing a lot.
Think about things before you do them make life easier not harder.
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Old 11-29-2014, 09:44 AM   #36
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I use my tow haul all the time when towing.
I have a so I can see the engine oil temp, coolant temp and trans temp.
Frank- VA {:-{)
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Old 11-29-2014, 10:22 AM   #37
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Tow Haul Button

My truck is still new to me, but I noticed that I can turn it off while cruising. I only have about 200 miles towing with it, but I noticed it acts like there is no load on it once up to speed. I turned it off and the tranny shifted to OD and stayed there. If it starts shifting back and forth, I put it back in tow/haul mode. You really have to "listen" and just find the happy place for your vehicle, IMO.

I should add that it's a '14 Ecodiesel with the 8 speed tranny... all those gears prob make a difference.
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Old 11-29-2014, 02:30 PM   #38
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Love mine, I especially like the added braking. I'm amazed at how well it holds 6th gear at highway speed in hills and overpasses. It says a lot about that 6.7 Diesel engine.

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Old 12-05-2014, 01:40 PM   #39
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Somewhere recently I read that on the Chevys another change is it increases the number of times the turn signal flashes from 3 to 6, when you just tap it. Tested mine the other day and sure enough that is true.
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Old 12-05-2014, 04:43 PM   #40
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Somewhere recently I read that on the Chevys another change is it increases the number of times the turn signal flashes from 3 to 6, when you just tap it. Tested mine the other day and sure enough that is true.
I always seem to get dumped on when I suggest people should take a couple of hours and read their owner manuals; who knows what else is in there that they don't know (but SHOULD)?

Here's the response I just got on the Traverse Forum when making the same suggestion to a guy who couldn't figure out how to get his dome lights to turn on when his door opened:

Yeah, I could spend "a couple hours" reading the owner's manual or I could spend 30 seconds searching the internet. It took me less time to get the answer from here than it would have taken me to walk out to the car and get the manual. Thanks for the suggestion though.

From my Silverado Owner's Manual:

Raise or lower the lever for less than one second
until the arrow starts to flash to signal a lane change.
This causes the turn signals to automatically flash
three times. It will flash six times if tow-haul mode is
Holding the turn signal lever for more than
one second will cause the turn signals to flash until
you release the lever.

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