Originally Posted by GalsofEscape
wow, my suv durango has a gvwr of 7100 lbs and everyone decries it for low payload at 1200 lbs.
question for the people who know, should the axle ratings add up to the gvwr? (I thought it did, hence my question as I noticed that my axle ratings do add up to my gvwr, but the posted gvwr for that truck does not ??)
This might help answer your question. I asked the same thing last year and here is 2 responses I got. I have a 2005 Ford Excursion.
My GAWR Front axle is 4700
My GAWR Rear Axle is 5250
The GCWR takes into consideration the weakest point in your drive train including suspension components, wheels, tires etc that came with that vehicle from the factory. Even though your GAWR may be more than the GVWR it technically does not mean you could "safely" exceed the GVWR. If your Excursion had come with a heavy duty payload option such as heavier wheels, tires, or heavy duty suspension components then your GVWR could have very well been placarded higher. This is a common practice where they will place axles on a vehicle that have a rating higher than what the vehicle's GVWR amounts to. Then, as that vehicle is built, it's GVWR gets limited to the suspension and drivetrain components that are installed on the assembly line.
And reply #2
Bilcin, my truck is the same. The sum of the GAWRs is more than the GVWR. The GVWR will be based on the weakest part - axles, wheels, tires, chassis, suspension, etc. Of course some people swear the GVWR is set by lawyers.