A few months ago my son wanted to borrow my trailer for a weeks vacation.
I went over everything, tire pressure, how many links to use etc.
He was driving from Fla to NY.
Called me from Ga and said I thought you said this rides like a train on a track!
He complained of trucks passing him pushing him around, and some sway in general.
I went over many things to check we found nothing wrong.
When he got to VA I asked about the cams, bingo, he thought the dual cams needed to be greased (metal to metal), he put axle grease on them.
I told him to clean that all off.
All was well for the remainder of the trip home.
Just thought I would pass this on.
I generally use the smallest swipe of Vaseline on them just to keep them quite.