I have the trailair hitch-pin 20K and trailair equalflex suspension attached to a husky 16K slider on a 2500HD duramax w/6 spd allision with airlift air bags. Loaded I weigh in at 22460 lbs CGVW. I do not get chucking unless crossing from uneven pavement to bridge or visa-versa or on roads with bad patch jobs. The chucking will occur when the trailair hitch bottoms-out because of severe road conditions.
Those that inflate the tires to maximum pressure and do not consider pressure to load will experience more chucking because of the stiff ride. The total suspension package should be considered and not just one or two items to solve the problem.
I have pulled my 3600RL over 19,000 miles mainly on the I-5, I-15, I-10, I-40, and I-70. I-5 N. of Los Angeles, I-70 E. of Denver and I-44/40 through Oklahoma City were the roughest ride.