2nd trip overall but first one we needed to get on interstate! I was supper nervous with all the "sway stories". pulled our new 3150bhd with 2011 ram sport crew cab 1500 4x4. It pulled like a champ, no sway ( dog tail wagging) at all!! Tires are for sure spongy P rated those will be replaced this week to LT. Keeled speed between 55-63 (depending if climbing) felt little push pull of complete rig when big rigs would fly by but not bad when they drove normal speeds. I think tires will help a bunch with squishy feeling.
Oh almost forgot had cross winds 17-20mph (those were little surprises but leaned to look at trees and anticipate when coming up on clearing. Averaged 11.3 going (no winds) and 8.1 mpg on way back with winds (terrain was hilly constant) trans temp 134. Coolant 201
Oil temp 212 & oil pressure 50 at max load up hills