OK, I have a Trail Air pin box on my Teton, Did it help the ride quality?? Yes... and No. Cushioned the ride, definately, front to rear "chucking" got a little worse. Possibly because I also lifted the coach 2. 5 ". Best scenario i have read about is, air ride hitch/MorRyde pin box combo. MorRyde deaks with the front to rear while the air hitch handles the up and down. May dump my Trail Air and go with the MorRyde for the IH 4700. Best of both worlds, albeit a little more expensive IMHO.