Chucking is caused by the trailer and TV going at a slightly different velocity because of uneven road surface. It is minimized by dampening like a shock absorber does with springs bounce. It is called dampening factor. It can be minimized with trailers towing by rubber dampening like MorRide pin box or air spring shock absorber combo like TrailAir. The air spring/shock absorber method is the most effective if the air pressure and shock absorber is selected properly and is in good working order. The idea is to get the dampening factor to one that eliminates overshoot.