Thanks for all of the great input! I was waiting for someone to take that $20 bet lol. My tires were at 80 psi, now 65 which is plenty for my 26' 6500# bumper pull. I may try 50 rear after reading this, thanks.
I just bought a 2011 Ram 3500 Laramie Longhorn, all stock 70k miles and it has 1 yr old Firestone AT's. I don't think shocks have been replaced yet, if were replaced they are factory mopar so I'll be replacing with Rancho's like I did on my last srw truck.
And about speed, that was first thing I noticed. Slowing down to dangerous levels (50 in 65) doesn't help. Going 80 though makes it non existant, like skipping over white washed roads off pavement.
Edit: my 2017 I traded for this truck had factory rear air Leveling suspension, the rear air does nothing for ride and that stuff was making noise every time I fueled like it was maxed out, pumping for couple minutes then it would let air out and stop, start again after couple minutes. Real air suspension does not have springs, this has been figured out in the semi truck world where they have bags on every axle and springs are only on pre-90's big trucks (and freightliners aka freightshakers) nowadays