I know this is simple stuff, but right now my head is spinning. I know my maximum tow rating is 11,000. The numbers on the door are GVWR 8800, front axle 4000 and rear 6000. I'm learning here, I use to know this stuff. I guess I loose it when not dealing with it daily. Where do I get the other number to determine my payload. So if my GVWR is 8800, what number do I subtract from this to determine my truck payload? There seems to be a number missing? There is nothing else in the door jam
Thats it. Thats all you need to know.
Method #1. Out here in the real world we use the trucks GAWR and in particular RAWR to determine payload as a 5th wheel adds little if any weight to the trucks front axle/tires. Look at my numbers for a wet pin weight in my above reply.
Method #2. Or as some RV folks use the trucks 8800 GVWR and subtract the trucks actual weight when loaded.
Both methods require you to weigh your truck. IMO its best to weigh the front and rear axles separately.