due to mine not having anywhere near as harsh suspension as leaf springs my column still "knocks" a bit when bouncing around the paddock, its not my ujs its actually inside the column itself somewhere, i just lived with it, not the first vehicle I have had that does it- my 98 holden rodeo ute had the same issue as well, my KZJ78 passes its 6 monthly inspections fine, on one of my other old holdens it was the bearing that the steering shaft went through the column hosing and it was just endfloat, I think it had this due to the fact the column will compress in an accident?
On a side note a 2019 landcruiser that I did a clutch had a noticeable knock in the column as well when hitting small harsh bumps and potholes on a driveway!