Towing has a lot to do frame springs breaking cooling check with your local dealer some mopars are not able to change springs It has to do with the brake system. there is a sensor to regulate break pressure when caring a load or towing. I have put 1 ton springs on a half ton but it don’t mean i have a 1 ton truck .

The axle is the same.

pretty much yes, the main difference between a 3/4 and 1 ton is the spring packs. so basically with the same suspension youd have essentially a 3/4 ton.most people just dont want to bother with the hassle of changing suspension components