BenK,
Grit Dog is right that there is no label on the receiver. At least there is no label on the receiver of my 2018 Ram 3500. Also, Ram does not make mention of derating when the 2" adaptor is used, at least not in my manual.
My manual states that the class V hitch is rated for 18000 gross / 1800 max tongue. The Ram 2018 trailer towing guide states that the Class V receiver has a max tongue weight of 1800 pounds. That's what I have to go on.
I know how to set up a WD hitch for towing. I've been doing this for 20 years and my previous trailer was 35', 9750 lb gross, with 1400 lb tongue weight. I used a ProPride hitch to tow that.
Thanks for all the help and suggestions from everyone. As I already stated, I will try the WD hitch I have that uses 1200 pound bars and see how it goes. However, for local trips I may also try without the spring bars.
-Drew