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Old 05-16-2016, 04:59 PM   #1
PSU1981
 
2015 27' Flying Cloud
Spring , Texas
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How much excess towing capacity

We have a 2015 27FB FC that I pull with a 2015 Tundra with 10,000 lbs towing capacity. The cloud has a UBW - dry weight around 5800 lbs - With Max gross weight of 7600 lbs. Anyways how much excess towing capacity should I have to say pull thru the Rockies? Be able to tow anywhere in the U.S. ?

Thanks,

Glenn
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Old 05-16-2016, 05:07 PM   #2
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It is more about your payload capacity,than it is about your towing capacity.You will know if you have enough towing capacity when you reach the Rocky Mountain pass.Some people are fine with the foot to the floor and a top speed of 45mph.Others get home and trade for something more capable.


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Old 05-16-2016, 05:41 PM   #3
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I don't know that there is any magic number but I recall years ago a rule of thumb that used to be quoted is that you should be towing at around 75% of your TV's rated capacity.

I doubt that is based on anything particular formula, but I have used it as a yardstick because it seems to me to be logical that for longevity and reliability of the tow vehicle it makes sense not to be pushing what the manufacturer claims to be the limit all the time. Things should be less stressed and last longer the less they are taxed.

So that is what I try to do, and it seems that is about where you are at also with your present rig.

Not sure how meaningful the 75% really is though as I read of many folk who tow at way over their vehicle's rated capacity and appear very happy with the results, reporting no problems at all, either in power, braking, handling, or in vehicle reliability problems - other than maybe going more slowly up hills!

Not for me though - I guess you pay your money and take your choice, I still like the 75% factor!

Brian.
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Old 05-16-2016, 06:05 PM   #4
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Your Tundra will pull your 27 foot Airstream over any mountain out west. You may not be the first one to the top (that would take a 3/4 ton diesel ) but you'll make it fine. You have more torque per pound that just about any gas powered Class A and they go over those passes all the time.

Your issue as mentioned previously is to make sure that you have not overloaded the payload capacity of your tow vehicle. Despite what Airstream says (825 lbs tongue weight,) your actual tongue weight is likely pushing 1,000 lbs.
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Old 05-16-2016, 06:30 PM   #5
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You have it, use it. You'll do fine, we have towed all over the country and every western state with similar trucks. Take it easy until you learn what it can do, and learn to use the transmission climbing and descending (very slowly on steep grades at first), the engine loves to rev to deliver power and provide compression braking downhill, let it, don't be afraid to use the truck and trailer service brakes to help hold speed when needed.

You've got a great truck that can pull any Airstream throughout the U.S. Don't let somebody talk you out of wasting money on a new one that you may not need.

Be sure you have a quality weight distribution/sway control hitch and setup, fully a third of a successful towing combination.
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Old 05-16-2016, 07:08 PM   #6
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I tow a 28' International with my Tundra (Crewmax 4x4 with Fiberglass cap). I have put "E" rated tires (highly suggest!) on and have a 1325lbs of payload capacity. The payload(Listed on white sticker on "B" pillar Driver's side)is going to be your limiting factor, but by no means a deal breaker. In other words, after 1050lbs of tongue weight and my wife and two kids, almost everything else goes into the Airstream.
I towed to Maine last summer with no problems whatsoever. I had plenty of power going up/down the Ski Resort areas in the Northeast. I would also suggest you get used to manually downshifting on the down hills to save your brakes, works great. FYI averaged about 10 mph.
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Old 05-16-2016, 09:10 PM   #7
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Quote:
Originally Posted by PSU1981 View Post
We have a 2015 27FB FC that I pull with a 2015 Tundra with 10,000 lbs towing capacity. The cloud has a UBW - dry weight around 5800 lbs - With Max gross weight of 7600 lbs. Anyways how much excess towing capacity should I have to say pull thru the Rockies? Be able to tow anywhere in the U.S. ?

Thanks,

Glenn
Based on the 5.7L:
380 HP/400 ft-lb
4.30 rear end
10,000# tow rating and you've got a 7600# max gross trailer.

You've got more than enough truck to tow that Airstream anywhere.

Now add a Hensley (or Propride) and you're in clover.
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Old 05-16-2016, 09:57 PM   #8
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07 dodge with 6.7 cumalong weighs 8800 towing a 13 31' classic with 7750 on the axles, plenty of power at 1600 rpm, exhaust brake on the down side really saves the brakes...
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Old 05-16-2016, 09:58 PM   #9
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Been towing my 1986 31' Sovereign with a 2004 Nissan Titan for 11 years and some 70000 miles all over the lower 48 including eight round trips to Yellowstone from Miami. Never a hiccup, never a "white knuckle" moment. The truck just rolled over 204000 miles.

On any grade up to 8%, 3rd gear and 3600 rpm gives me 65 mph. My foot has never been "on the floor".

You truck is far more powerful than mine and has better brakes.

My only limitation, as noted in several earlier posts is payload. Hasn't been a problem as we carry very little in the bed of the truck.

Mike
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Old 05-17-2016, 12:10 PM   #10
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Tundra

The problem with Tundras is not the pulling, it is the stopping. There are a couple of inexpensive fixes using drilled and slotted rotors with a semi ceramic pad. Makes about a 20% improvement cold and maybe a 30+% improvement hot. These kits are less than $500. Go to the dealer for the big brake kit and you will be looking at close to 7k, granted it is a much better setup and has much better performance.
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Old 05-17-2016, 12:13 PM   #11
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A bit smaller trailer but we pulled our 25' Flying Cloud through the Rockies last year with our 2012 Sequoia without any problems. Same drivetrain as your Tundra.

See this Youtube video of someone else pulling an Airstream 25' in the Rockies with a 2010 Tundra:
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Old 05-17-2016, 01:11 PM   #12
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Originally Posted by bigirish2 View Post
The problem with Tundras is not the pulling, it is the stopping. There are a couple of inexpensive fixes using drilled and slotted rotors with a semi ceramic pad. Makes about a 20% improvement cold and maybe a 30+% improvement hot. These kits are less than $500. Go to the dealer for the big brake kit and you will be looking at close to 7k, granted it is a much better setup and has much better performance.
Mike S
Trailer should be pulling err, stopping its weight.

The original electric brakes on my '65 Ambassador were phenomenal. I don't think it was possible to fade those drums out, and the stopping power was nose-bleed rating.

The electric brakes on my 2005 Classic 31', not so much. Never felt comfortable with that setup.

Couldnt be happier with my current electric/hydraulic setup in my 30' S/O Classic. Dexter 1600psi actuator, and 6k disc brakes. All the way down Big Horn, Continental Divide, Smokies, and everywhere else, never a hint of fade. Could stop a rig 4X my weight. Wonder why Airstream dropped them.
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Old 05-17-2016, 01:21 PM   #13
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As a person who tows in the mountains a lot (live in Boulder CO), here's my two tips:

You have plenty of engine.

At the top of the pass, leave it in 2nd gear and enjoy the slow downhill. If you get up to 50mph just down from the pass, and need to slow further, it can get dicey.

Eric
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Old 05-17-2016, 01:52 PM   #14
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As has been said, it's all about payload.

The tongue weight of my 2014 FC25FB with solar is 1252# on the Airstream scale in Jackson Center. That is the loaded weight with about 800# of cargo. I could not configure my 2013 F150 3.5 Ecoboost, 3.73, max tow and cargo options to not exceed the drive axle GVWR of 7700#, never mind the stock tires 2600# rating. I was well under its 15,400# GCWR. A Blue Ox with 1500# bars with "one link showing" got the drive axle to about 150# over by transferring weight to the trailer, not the steer axle. I now have a 2016 GMC 2500 Duramax which solved all my "problems".

Based on posts I see here my guess is that at least half of us are happily driving tow vehicles that are overloaded in one way or another. The F150 drove like it was all good, but the scales told a different story.
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