The important thing to worry about is your “pin weight” That is the weight that is put inside your bed. That effects your suspension, front and rear and things like steering! In your RAM 2500, if it is “heavy Duty”, you should have the same transmission, breaks, differential as a 3500. So the next thing to check is your tires, and their rated capacity. While things like “helper springs” air bags and other “fixes” can solve an issue, you need to look at the truck as a whole to ensure your towing safely.