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Old 04-17-2014, 02:15 PM   #11
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Originally Posted by Cajun Po-Boy View Post
ceorear, it would help if you posted what tow vehicle you're talking about.

X2...Why do so many FRF members don't fill out their TV & camper info on sig page???

Only helps us help others a little faster
Agree to a certain point, but it really makes no difference what his tow vehicle is, if it has a tow/haul button and he's towing, it should be engaged per all vehicle manuals. The mfg put it there to be used when towing/hauling period.

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Old 04-17-2014, 02:16 PM   #12
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If you don't use the tow/haul button, you will probably experience a lot of shifting in and out of overdrive. That puts a lot of extra heat and wear-and-tear on the tranny.

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Old 04-17-2014, 03:29 PM   #13
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I use the tow haul button every time when towing. Better on engine for downhill engine speed reduction vs using brakes in full.
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Old 04-17-2014, 03:48 PM   #14
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Originally Posted by kerrlakelover View Post
Ditto Oakman...I know it's hard for us guys to read the owners manual. But, when all else fails, you have to sometimes. Whoa, just had an epiphany...that's why the RV manufacturers don't put time and effort into the owners manuals!!!
tow haul all da time......cuz it activates the exhaust brake on diesels...

and read the owners manuals?? the dang sync radio manual was an handed me a carton of books.....i was like is there a test?

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Old 04-17-2014, 03:53 PM   #15
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Thanks for the help & I'm using a 2013 F150 with 3.7.

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Old 04-17-2014, 03:53 PM   #16
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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..
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Old 04-17-2014, 04:10 PM   #17
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From 2013 Ford F150 owners manual. page 272

• If your transmission is equipped with a Grade Assist or Tow/Haul
feature, use this feature when towing. This provides engine braking
and helps eliminate excessive transmission shifting for optimum fuel
economy and transmission cooling.
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Old 04-17-2014, 04:48 PM   #18
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On all the time if towing more than the utility trailer. Works very well.
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Old 04-17-2014, 05:02 PM   #19
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So just to be clear on the Chevy recommendations:
My truck has a GCWR of 16,000, so 16k x .75 = 12,000
My Curb weight is 6,200, so 12,000-6.200=5,800 So anything over 5,800 lbs. will benefit from the tow haul mode (on my truck).

Edited to fix my GVWR and actual vehicle weight confusion.
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Old 04-17-2014, 05:09 PM   #20
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Max Tow = GCWR - the actual weight of the vehicle.
Payload = GVWR - the actual weight of the vehicle.

So, Max Tow should = GCWR - GVWR + Payload.

That means you've got about 9400-6600= 2800 payload.

(relatively speaking, since there's a lot more variables than that.)

There's no use crying over spilled milk, unless it's on your keyboard.
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