Originally Posted by c.leisure
I'm looking at a 2005 f250 SD, super cab 4x4,
(with automagic tranny, 5.4L V8 engine, 4.10 axle)
When i look on trailer life the towing it gives me is 11,200. Ford fleets towing guide tells me 12500 with a weight distributing hitch.
GCWR is 18,000. Tow rating for a bumper-pull trailer is 11,200 pounds for the 5.4L engine with 4.10 axle when the wet and loaded tow vehicle weighs not more than 6,800 pounds.
12,500 tow rating is for the V-10 and diesel engines.
I cant figure out if i can even do a 5th wheel.
Tow rating for that truck for a 5er is 11,200, per the 2005 RV and Trailer Towing Guide.
But when I look up the VIN# it says a max tongue weight is 1020. So based on that info the towing calculator at changing gears says I can only haul a 6,800lb trailer.....HELP!
That's the tongue weight limit of your receiver with a weight-distributing hitch. You can replace the receiver with a stronger receiver and then your limiter is the GVWR or GCWR of the F-250.
If you don't replace the receiver with a Class 5 receiver, then your max tongue weight is 1,020 . But using only 10% tongue weight is another cruel joke. Average tongue weight of a small to medium-size TT is 13%. So divide 1,020 by 13% and the answer is a TT with gross weight not more than 7,846 pounds. That's a nice smaller TT, but they make some that weigh a lot more.
The calculator you used assumed a tongue weight of more than 15% of gross trailer weight. (1,050 divided by 6,800 = 15.44%) Some TTs have as much as 15% tongue weight, but the average is 13%. So I use 13% when calculating approximate max trailer weight.
For a 5er, if you install a normal 5er hitch rated for 16,000 pounds gross trailer weight, such as the Reese R16, then the hitch is no longer your limiter. GVWR or maybe GCWR of the tow vehicle is your limiter.
To determine the max weight of any 5er you can tow without being overloaded, you must know the wet and loaded weight of the F-250.
For example, the GVWR of a 2005 F-250 is 10,000 pounds. A wet and loaded (2005 f250 SD, super cab 4x4, with automagic tranny, 5.4L V8 engine, 4.10 axle, 5er hitch and a family of 4 with their stuff) could easily weigh 7,500 pounds. 10,000 minus 7,500 = 2,500 pounds max pin weight. Smaller 5ers have pin weight averaging about 18%. 2500 divided by 18% = 13,888 max 5er weight. Since 13,888 exceeds the tow rating of your truck, then the GCWR is the limiter for your truck.
But remember above we said the tow rating for your truck is 11,200 only when the wet and loaded truck weighs not more than 6,800 pounds. The real world tow rating is GCWR minus the wet and loaded weight of your truck. So if your wet and loaded truck weighs 7,500 pounds, then the real world tow rating of your truck is 18,000 GCWR minus 7,500 = 10,500 (not 11,200).
In any case, I would not even think about towing a 5er with GVWR over about 9,000 pounds with that older gasoline-engine truck. It might do it, but towing won't be any fun.