I'm not sure exactly what everyone means by the term 'chucking,' but most of last season I experienced a small amount of slipping between the fiver king pin and the 5th wheel hitch. When coming to a stop, or starting up from a stop, the hitch and king pin seemed to slip fore and aft a bit and bang into the opposing side of the king pin. We experienced none of this the first season we owned the trailer (new trailer, new hitch). The second season (last year) is when it started. What would cause this? I use the 12" plastic lube plates, no grease. Am I getting wear around the king pin or should I be greasing this? Or do I need to re-adjust my brake controller? Please advise as I fear this situation will get worse this season.
FYI - I have a Reese 15K manual slider hitch, factory kin pin and box on the Ultra Lite Rockwood.