Looking at a 40' 5th wheel, how is the 6.4 going to do?

[Carl Lassiter]

Originally Posted by djen223

I would also say i am under gcvwr. as the original poster was asking if he could pull a 40ft trailer. my truck gvwr is 11400 and the towing capacity for a 5thwheel applications is 15400. making 26800 your gross combined weight max. my fuzion gross is 16k and ive had it up to 15 which at the cat scales had my gross combined weight at 24,000 well within the safe zone. and as stated above your trailer brakes are what stops your big trailer. just like a set of big rig triples going down the road.

forgot to add that this setup does not exced my gvwr either.

15,400 towing assumes vehicle is running without payload. So it's more like 15,400 + 8500 = 23.9k

6.4 with 3.73s should be able to handle that weight, as others have said it's the rear axle and tires that cops will try and get you on. Stay within those, stick to a sensible speed and you'll be fine. I've pulled 13k (14.5k max per manuf specs) up 6% grades in 105 degree heat and had no complaint from my 3/4ton. Don't see why the 6.4 should be much different at handling similar weight while the F350 is meant for heavy towing. Use tow haul mode and get your integrated brake controller set up correctly and you'll be fine.

[SmokeyWren]

Originally Posted by djen223

my truck gvwr is 11400 and the towing capacity for a 5thwheel applications is 15400. making 26800 your gross combined weight max.

No.

You're mixing your apples and your oranges.

Your Ford towing capacity is a made-up number that is supposed to be the GCWR of your truck minus the wet and loaded weight of your truck before you tie onto the trailer.

The GCWR of your truck is 23,000 pounds. If you subtract your so-called towing capacity from 23,000 that leaves only 7,600 pounds for the weight of your wet and loaded truck. And your wet and loaded truck, including driver, passengers, toolbox crammed with tools and fluids, 5er hitch installed, and anything else in the truck such as pets, coolers, a floor Jack that I always haul when I'm towing, will weight a lot more than 7,600 pounds. For a CrewCab 4x4 diesel longbed with a spray-in bedliner and normal tools and extra fluids in the toolbox, 8,600 is a lot more realistic number.

Ford gave you the gross combined weight max as 23,000 pounds. Why do you think you can flash some numbers around and somehow wind up with more than 23,000 pounds?

... at the cat scales had my gross combined weight at 24,000 well within the safe zone.

Safe zone? Says who? Ford says the max GCW is 23,000 for max safe combined weight. So the "safe zone" is anything less than 23,000.

forgot to add that this setup does not exced my gvwr either.

I hope you're right. What does the CAT scale say when the truck and trailer are both loaded for bear, with a full tank of diesel and driver and all passengers and tools and other stuff in the truck?

[djen223]

here is my cat ticket. im on the gnats behind on the truck gwr if im reading it right. my gwr is 11400 on the door. as far as towing capacity it sure is misleading on the ford guide to what you can tow compared to what your saying. and i have 4.3 ring gear.
loaded for bear, is me and my wife ,my 3 kids are grown and gone, the tools are in the garage of the trailer.

[SmokeyWren]

Originally Posted by djen223

and i have 4.3 ring gear.

Hold it! Waitaminute!

I missed it before now, but if you have a 4.30 ring gear and pinion in a 6.4 SRW, then you don't have the original ring gear that came in your truck.

2008 SuperCab long bed 6.4L 4x4 SRW has a GVWR of 11,400, but 3.55 or 3.73 gears were standard or optional during the 2008 model year. There was no option for 4.30 gears in the diesel-powered SRW.

4.30 gears were optional in the DRW as part of the TowBoss pkg. But the GVWR was 13,000, not 11,400, and the GCWR was 26,000, not 23,000. Assuming stock-size tires. You do have stock-size tires, right?

[djen223]

that is correct, I had 4wheel parts warehouse install 4.3 gears, my truck came stock with 3.55's which are hanging on the wall in my garage, i am running stock continental tires of 275/70/18. I bought the truck before i bought the trailer. before I ran a 25 ft 5th wheel with a trailer behind it, I am more comfortable with the toy hauler but agree now that my weights are border line and a dually would be a better choice.

[jasonmt]

Originally Posted by SmokeyWren

2008 SuperCab long bed 6.4L 4x4 SRW has a GVWR of 11,400, but 3.55 or 3.73 gears were standard or optional during the 2008 model year. There was no option for 4.30 gears in the diesel-powered SRW.

11,400#'s should be a short box truck, not a long box though.

[djen223]

my long box says 11400 on the door.

[SmokeyWren]

Originally Posted by jasonmt

11,400#'s should be a short box truck, not a long box though.

Per the 2008 brochure, the F-350 SRW SuperCab shorty has a GVWR of 11,200. The long bed has 11,400. They both have about the same payload because the shorty weighs about 200 pounds less than the real truck.

[fordson1]

Originally Posted by SmokeyWren

Per the 2008 brochure, the F-350 SRW SuperCab shorty has a GVWR of 11,200. The long bed has 11,400. They both have about the same payload because the shorty weighs about 200 pounds less than the real truck.

I'm confused Mr. SmokeyWren, guru of truck numbers...... did you get those backwards?

[RatherBNtheWoods]

Originally Posted by fordson1

I'm confused Mr. SmokeyWren, guru of truck numbers...... did you get those backwards?

No.
The long bed weighs 200 lbs more so it's GVW is 200 lbs more...11200 -11400.
Makes the payload the same.

[jasonmt]

Originally Posted by SmokeyWren

Per the 2008 brochure, the F-350 SRW SuperCab shorty has a GVWR of 11,200. The long bed has 11,400. They both have about the same payload because the shorty weighs about 200 pounds less than the real truck.

I was thinking Crewcab and not Reading Supercab...