Here is an article you might find of value.
http://www.momentumgunner.com/towing_notes.html
There are links in that article to the official Ram towing/weight ratings. In your case, you don't say what cab, transmission, or trim level you have. I'll run with a 2500 CC Tradesman Auto for now. You have 3.42 gears.
Your GVWR is 10,000 pounds. Your front GAWR is 5750, rear GAWR is 6000. You should not exceed ANY of these numbers. Your base weight is 7673 with 4779 front and 2893 rear.
Subtract your base from max and you are at the following available numbers - 2327 payload, 971 front axle and 3107 rear. You don't want to hit any of these numbers as doing so would remove your safety margin. You want to stay below them. You will note that you will hit a payload limit before the RAWR.
What is your trucks actual weight? You need to load it as if for towing (with hitch, people and supplies you'd take on a trip, full DEF, fuel, oil, wiper fluid, etc). Go to a CAT Scale and get weighed. That way you know what your current setup is. It will be higher than the base weights. Then you subtract your actual weights from the max weights.
Then you need to look at your trailer. What are the weights on it? The 348M has a GVWR of 16,500, dry of 13,400, and a pin weight of 3100 pounds.
First problem, hitch is 3100, and your truck stock can only carry 2327 payload. That payload includes you, your family, dogs, cats, hitch, and everything loaded in the truck, plus the pin weight. The pin weight alone of the trailer exceeds the available payload that you have. Most of that pin weight will be distributed to the rear axle - which (assuming your truck is curb weight only) would put it right at that limit too - even if the payload was not an issue.
Changing your gear ratio will not change the load that you can carry in your truck. It has a relationship to what you can pull with it, but you will be over the limit for the truck you have even with enhanced gears. Adding airbags will help level the bed, but will not give you a higher GVWR.
Your GCW is also an issue - 16,500 + your truck weight as for towing = ? Your truck can go to 10,000 pounds GVW, it has a GCWR of 25,000 pounds. 16,500 + 10,000 = 26500. You could manage that by managing payload in both your truck and trailer, but your payload issue says no go.
A 3500 will greatly increase your capabilities and let you stay within a safe margin towing the 348M. Take a look at the article and let me know if you have any questions.