With my 2013 6.7, I do a lot of towing both gooseneck and bumper pull. I've installed airbags in the rear and a front leveling kit with add-a-leafs in the rear. I'm stilling running the stock Rancho shocks. I have increased my tire size to ~35" BFG A/T tires. The truck seems to ride like a box wagon when there's no trailer behind. Will new shocks help me or am I going to have to deal with it. Also the new leaf springs make a squeak/creaking sound over the smallest bumps. Any way to fix this? Any suggestions are appreciated.