Originally Posted by EPrince
Thoughts on the size of my truck... books shows a towing capacity of 15K and the trailer shows 10.5K?
Capacity to pull (max trailer rating) and the capacity to "carry" (available payload on the truck) are two very different things.
IMO, to discover how much "trailer" you can actually pull for YOUR situation (family, cargo in the truck, mods to the truck, etc) weigh your truck NOW with your family and planned cargo on board; subtract that weight from your GVWR of your truck.
That is the remaining available pin you can carry.
Since the pin weight must fall between 15 and 25% (for 5th wheels types only - Travel Trailers fall between 10 and 15% for tongue load) of your gross camper weight (unhitched sitting on the pavement - not axle load), you can reverse figure your max camper weight available.
So since you have a 3/4 ton "class" with diesel (much heavier than stock engine) we will use my GMC Sierra with Duramax as an example.
Max GVWR = 9200 pounds
Weight with family and dog, full gas tanks, hitch, generator, tire changing tools, and wood leveling blocks: 7600 pounds
Available payload left for pin weight: 1600 pounds
ACTUAL available towing capacity (15,400 pounds published):
FORMULA - available pin / decimal of percent ratio = available camper size
IE 1600 pounds divided by 0.20 (20%) equals maximum camper weight unhitched.
At 20% "optimum" pin weight for handling: 8,000 pounds
At 15% minimum pin weight (careful loading required and you WILL get front end "hunting" while driving and accelerated front tire wear.) = 10,667 pounds
At 25% Max loading (hard to do normally but could happen easily with some floorplans) = 6,400 pounds.
All three no where near the "listed" 15,400 pounds by GMC.
The REASON is because the 15,400 pounds REQUIRES a regular cab STANDARD TRUCK (no weight adding options or custom modifications); EMPTY, except for a 150 pound driver and full tank of gas).