[jsb5717]

You're still in the same boat. The OEM specs on weight are indeed partially related to length. But also about configuration and amenities. The 3231CK weighs more than the 3931. Regardless, it's always about the numbers. No matter which trailer you're considering you'll need to start with the math. Since you have your truck you should know what your working payload is. Have you checked the yellow sticker yet? That number is one of your key starting points.

Every trailer will have an OEM posted GVWR. Take 23% of that number to use to calculate loaded pin weight. Still add people, hitch, gear, etc. The total of those numbers is the amount of weight you're going to put onto the truck. If the total weight is significantly higher than your truck's payload then you've got a problem.

The problem you're going to continue to have is that there really aren't many full size 5th wheels that should be towed with a 3/4 ton truck. Just set yourself up a simple test grid:

A - Truck
Truck Payload (A) (from yellow sticker) = _______

B - Weight
Trailer GVWR x .23 = _______
Hitch weight = _______
Total People = _______
Add'l gear = _______

Total (B) = _______

A - B = _______

If your answer is a negative number then you've got a problem. That means that your total weight going onto the truck exceeds its rated payload.

Does this make sense?