2oldman wrote:
His profile shows a Heartland 37. If that means it's 37 feet long, that's WAY overweight for his truck.
I think you're correct in that assumption.
From looking at Ram website, the truck has max payload of 1501 lbs, and max tow about 9100 lbs. If the rear end is 3.55, tow capacity is only 8100.
I looked at several sites listing Heartland 3700s. All had pin weights near 2500 lbs. Some were closer to 2800. All had gross weights at or above 15000 lbs.
If those numbers are correct, the truck is not overloaded by just a little, but, overloaded by a lot. It's over on towing capacity, payload, GVWR, GCVWR, and most likely axle weights and tire loading.
As far as voiding warranty, adding airbags would not do that. However, overloading could, and airbags won't fix that.