Originally Posted by spanky63
GCWR, GVWR, GWAR???? What do these abbreviations stand for? This is all greek to me at this point.
GCWR = gross combined weight rating, which is the maximum weight your rig (tow vehicle and trailer) can weigh on a CAT scale. The GCWR indicates the amount of weight your tow vehicle (TV) can pull
without burning up something in a well-maintained truck. It is based on the power of the engine and drivetrain, along with the leverage effect of the rear axle ratio. If you exceed the GCWR of your TV, then you won't have enough power to pull the trailer up a normal highway hill or mountain pass at normal highway speed, and when you downshift to get more leverage to force the rig up the grade, you'll probably overheat the engine or transmission or rear differential.
GVWR = gross vehicle weight rating. Both the TV and the trailer have a GVWR. The GVWR of the TV limits the max hitch weight you can haul
on the 4 truck tires with stock tires and suspension in good mechanical condition. The GVWR of the trailer tells you the maximum weight the trailer suspension, frame, axles and tires can support without being overloaded.
Exceeding the GVWR of either the TV or the trailer can result in failure of tires, wheels, suspension components, axles, brakes, and/or frame of the vehicle.
GAWR = gross axle weight rating. GAWR is the maximum weight the axle is designed to carry without overheating differential, wheel bearings, or tires, and without bending or breaking the axle components or wheels. fGAWR and rGAWR are for front or rear axle limits.
GAWRs on TVs are not additive. The combined GAWRs of front and rear axles will usually be more than the GVWR of the TV. That allows you to have more weight on either the front axle or the rear axle without exceeding the GVWR.
Note that GCWR indicates the max gross trailer weight you can pull, while the GVWR indicates the max hitch weight the TV can haul. With a TV that has single rear wheels (SRW), GVWR is almost always your limiter. You will run out of GVWR before you get close to the GCWR.
You never want to exceed any of the weight ratings, but GVWR is the one weight rating you'll probably need to worry about most. If you never exceed the GVWR of the TV, then you probably won't exceed any of the other weight ratings either. But some few TVs have a weak rear axle, so on those you may be able to exceed the rear GAWR without exceeding the GVWR of the TV. That's why they make CAT scales. Use then frequently to be sure.
And what is wet and loaded truck weight?
Ray explained that one pretty good. "Wet" means a full tank of fuel, along with all the other liguids in the TV such as oil and coolant and transmission fluid. "Loaded" means your normal load of people, tools and other stuff that will be in the TV when towing.
On in a trailer, wet means full tanks of propane plus whatever water you usually haul in the holding tanks of the trailer. Loaded means the camper is loaded with the normal bed linens, food, drinks, camping supplies, clothes, coats, pots and pans and other cookware, dishes, flatware, and anything else that is normally hauled in the trailer when on a camping trip. For example, we carry a few gallons of "bottled" or reverse osmosis (RO) water in gallon jugs stored the bathtub while on the road. (We don't trust campground tap water for drinking water, coffee, tea, or cooking.)