^ I wouldn’t use “super chips” on a newer gen truck just because so much more can be had from greene or Hemi fever.
12k pound towing with a half ton.... such over kill... I bet that is a scary scary ride pulling that much weight with such a small truck. Which is funny cause the consensus around here is gas Hd up to about 12k-13k and diesel hd after that. I thought a 2012 eco boost with a 28ft toy hauler behind it felt light on the front tires... just imagine 4K more pounds back there. Just my 2 cents..
I own a 1/2 ton and tow about 8500 to 9500 lbs with it at times, pulling a Pontoon ,pull behind,Tandem flatbed. With no issues pulling the weight providing I adjust the speeds for the speeds and conditions. Always though I could do little more over its weigh rating of 9900 would be easy but not done it. Ram is saying now for 2019 with a 1/2 ton you can pull 12700 max. I really do not think Ram would expose their-self to the legal ramifications if its unsafe. If pulling for long distances more frequently may be best for a larger capacity.
One the largest issues of pulling campers/Trailers over the last 15 years when the 1/2 limits started with increases of pulling capacities with quality of build do we see many people who are unsafe with the trucks being safe. I will argue all day long pulling any loads below capacities of each series trucks at high speeds,Wet Pavement,Wind gusts days are very unsafe to say the least. The last 10 years is really bad. For quite many its I can pull more faster than you!! When I see 75 MPH pulling any thing with a PICKUP TRUCK I'm not impressed!
I have 2500 gas pass me pulling same weight or near my weight at 75 and 85 MPH!! LOOK AT ME!!! Its down right crazy to pull any trailers much over 60 MPH and be safe.The diesels have no better stopping power or stability than the gas. The 3500 dullies have passed me upwards of 85 MPH!! I would call that way past OVERKILL Just glad they pass and move on away from me. I would rather have a 1/2,3/4 or 1 Ton pulling at safe speeds at their limits with me on the road than high speeds at or under their limits at killer speeds with a load.
The diablo tuner with a Jay Greene Tune or Hemi fever Tune is not going to help a bit with towing at or near weight capacities. Many things come in to play with towing. Tongue weights as well play huge factors.The type and make of the hitching helps by far more than a Tune will.My weight limits is 9800 some 1/2 tons go to 10500.
If the new weight capacities do not feel safe at the new rate then move up to another truck or trade down in camper weight. I can pull 5400 Lbs pontoon dont know its back there hardly but my speed limit is 60 if dry ,no wind, and light traffic.....if not, slow to 50 or even less if I need too. If I become an "Obsticle" I speed up or slow down to not be.
The Driver ,equipment along with condition of what your pulling and weather factor all come in to play as most important keeping with the weight capacities of the pull vehicle. Nothing better than sharing the road with others who are pulling safe with you on the road.