I am having difficulty finding the exact Towing capacity for a 1975 F100.
Looking at a new boat that weighs:
4,600lb which I believe is 2.050 ton, or
2,100kg which is 2.1 tonne.
the trailer will have the appropriate breaking system.
the F100 will have the correct tow-bar.
We work in Kg but I can convert lbs easily.
Can anyone assist me please.
Cheers
Phillip

 

It might have a ford 9" rear end, and you'd be ok, but if it is a D44 then you'd have to take it alittle easier, but still very doable.
I'd pull 5,500 lbs and still feel comfortable, any more than that, I'd want to start upgrading things, but you said it has a working break system, so stopping is covered.
Another thing you might want to think about is the gear ratio, do you know it, if not go to the rear axle where the bolt circle is, and look for a metal tag, and get back to us with the numbers.

 

What kind of tounge weights (or masses ) are you talking about for those trailers? I'd guess that would be the limiting factor here if you had properly adjusted trailer brakes.

 

What is the size of engine, and the type of transmission?

Get the metal tag number from the rear axle. It's mounted behind the u-joint and yoke assembly on the third member gear assembly. Post the numbers and letters on axle metal tag.

 

You never said what engine

Trailer Classes.
http://www-5.jeep.com/vehsuite/towin.../j/classes.jsp

so,for a 75 F-100 with a 360.
Since you say "Tow Bar" and not a proper "Equalizer Hitch" I have to go with
Trailer Classes.



Class 1 (w/o brakes) up to 2000lbs for F-100 w/360 @ 5200Lbs Gvwr


Trailer weight for a F-100 W/390
Class II (w/brakes) 2000-3500 lbs for F-100 w/390 @ 5500 lbs RC or 5700 lbs GVWR

Class III (w/brakes) 3500-5000 lbs

There's more ,but I won't add it unless you have a 390, otherwise that's the info above.
I hope this has helped ?

 

I briefly read your question and the answers. Another factor to consider is your rear tire rating. F-100, F-150, F-250 etc. is the manufacturer rating of the weight you can haul. If you go over this weight, you void the warranty, which is no longer applicable to you. Bridge law (in Montana, it may be a little different in your state) would allow you to go 11,000 lbs with a single axle. No fool on earth would put this amount of weight in the bed of a pickup. That is why your rear tire rating is the limiting factor. I hope this didn't confuse you. Statutory weight limits are something I know a little about. I'm a Motor Carrier Services Enforcement Officer, I weigh trucks of all size all day long. Professional truck drivers sometimes have difficulty getting it right. I would contact a weigh station in your state and ask them the question.

 

Thanks for the replies. I am flat out with my business a the moment so will be free in a couple of days.
Cheers
Phillip

 

I have a 75 F100 4x4 w/390fe & 4 speed manual transmission. It has a flat bed on it and has helper springs to beef it up. Does anyone here have any idea who much I can tow w/trailer brakes and controller and how much weight the bed of this truck can carry? I need to transport hay and not sure how many bales and how much weight I can carry. Thank you.

 

As mentioned, the answer depends a lot on specifications. I believe best capacity would come with 1) V8, 360 or larger or 300 I6 2) C6 automatic + transmission cooler or heavy duty 4 speed manual 3) 4.10 rear ratio and near OE diameter tires 4) frame mounted weight distributing hitch. 5) effective trailer brakes

With that I would personally be OK towing a 5-6,000 lb boat. The weight distributing hitch puts some of the tongue weight on the truck front axle for better balance and less load on the rear axle.

If the 9" axle is heavily overloaded, it has a tendency to spit out the axles which is not good.

For hauling hay, probably best to keep the bed empty to limit load on the rear axle and run a tandem trailer as above. If you need to haul often, a 3/4 ton or heavier truck would be much better.

 

This is what I have so this is what I am working with. Not a 3/4 ton and not a trailer. If someone has an actual suggested weight limit on the bed of this truck, please share.

 

Since you asked... maybe the original payload was 1500 lb. The flatbed is maybe/probably heavier than the OE bed so payload is now 1200 lb. At 50 lb/bale that would be 24 bales of hay on the bed. A guess.

 

I have a 71 that I tow with often and I can say that 5,000-6,000lbs is my comfortable limit. That's with a stout 351, 4.11 gears, class 4 receiver and trailer brakes. I would take a 7,500 load if I had to, but I wouldn't want to go through any type of hills with it. (Brakes!) I might attempt to pull 10,000 around the block.... But I've also got my 99 power stroke that will yank anything short of the earth itself, so there's no point in overworking the F100.

Now, as for your payload, I can haul 2,500lbs and still have a room for some suspension travel before its on the bump stops. How much you can carry depends on what springs you have and what their condition is. Just load it up until your about 1-1/2 to 2" above the bump stops, and then estimate that weight.