jkc0607

I would love to have some of you tow experts to check the figures. Thanks in advance.

Numbers from the truck:
GVWR = 7,000
GCWR = 16,200
Front GAWR = 3,525
Rear GAWR = 3,800
Payload on the yellow sticker = 1,630

Actual weights (2 people, 3 large dogs, 7/8 full tank, no gear)
Steer axle = 3,360
Drive axle = 2,620
Total = 5,980

Calculation for towing limits:
Using 15% safety factor...
Maximum trailer gross weight (wet + WDH weight) is
(16,200 - 7,000)X 0.85 =~8,000
Maximum tongue weight is (using the GVWR to calculate as rear GAWR will not be the limiting factor
(7,000 - 5,980) X 0.85 = 867

With these figures, I should be within the Ford specs with Front and rear GAWR, GVWR, GCWR, towing capacity etc...

p.s. I intend to drive light in the truck and store most of the gear in the trailer.

p.p.s. Why does Front GAWR + Rear GAWR not equal to GVWR??

Ricktwuhk

Numbers look right, but of course the 1/8th of a tank is another 25 or so pounds.

I notice that the Payload of 1,630, minus 2 people and 3 large dogs yields 845 (subtracting 25 pounds), so that's 788 pounds for 2 people and 3 large dogs? Is that right, or did you add a tonneau cover and other stuff?

GAWR is the static weight on the front or rear axle.
GVWR is the static weight on the entire truck, not just the two axles.

GVWR takes into account the ability to support and move the load safely with all the components of the truck.

SixShooter14

just out of curiosity, are the weight of the wheels and tires included in the GAWR?

jkc0607

2 persons = 325
Dogs = 200
7/8 tank of gas = 29 X 6 = 174
Tonneau = 50
Total = 749

Thanks

lewisra

GAWR is the max for the individual axle. You could put 3800 on the back, then you could only have 3200 on front worth out exceeding GVWR. The 7000 is the max the structure of the truck can handle, including accelerating and stopping.





I think.

smokeywren

GVWR considers braking power and frame strength as well as axle weights. Your axles can handle more weight than the brakes and/or frame. So GVWR is less than the combined GAWRs.

But that means you can have unbalanced weight front to rear. For example, a heavy snow plow on the front end, or a heavy hitch weight on the rear end, but not both at the same time.

With a snowplow on the front, and a sand spreader with a bed full of sand on the back, you might not exceed either axle rating, but you'd still be overloaded over the GVWR of the vehicle.

Yes. GAWR is the max weight that can be on the tires of that axle when sitting on a scale. Everything in and on the truck that puts weight on the tires that are on that axle, including the tires. So GAWR is not the rating of the axle itself, but the weight on that end of the vehicle on the scale.

acdii

Interesting that you axle weights are lower than mine by 200#.

SixShooter14

Mine are:
Fr: 3375#
Rr: 3800#
GVWR 7050#

Mike Up

Read this post I just put up.

You always want more total axle weight rating than GVWR so when you load your truck differently you're not over the axle ratings.

In fact, I'm disappointed that Ford's axle ratings are so low next to other 1/2 ton trucks that have much lower GVWR.

I notice that with my other F150s that only had 3750# front and 3850# rear with 7350# GVWR while dodge was 3900# front and rear w/ 6800# GVWR and GM was 4000# front and rear w/7000# GVWR.

Our 15s and 16s look pathetic with these low axle ratings next to the competition. However, it's likely a numbers game as if you go over your axle ratings in most circumstances, you'll be over GVWR. While axle ratings determine structural strength of the parts, GVWR determines safety pulling a load which takes into account braking, body roll, suspension, and more so the truck handles the load safely.

Just remember everything is a guide and you should get the rig weighed at a scale.

jkc0607

Once I get the trailer, then off to the scales again. I will know better what to do and how to do it. Full tank, full gear loaded etc...