Anti-chucking pin box devices

Airsafe hitch and F450.Hitch lets trailer float over most bumbs,but if you brake really hard or excellerate WFO,it chucks when it reaches the end of its movement,about 4 inches.Driving down the road on most bumbs and expansion joints you can see the rear of the truck bounce,and the 5th float.If you drop the truck of a curb it will bottom out,make a boom,and then resume its job,don't ask...It works really well on dirt washboards,when the truck is bouncing like crazy,the trailer looks like its doing mini pushups,and hardly moving..thats why I got it.