Agree on getting the little pads that fit on the L-brackets for the Equal-i-zer system. It quieted mine down a lot. And, I NEVER greased or oiled the bars where they touch that L-bracket on the trailer tongue. The system needs that friction to work effectively. The pads will stop a lot of noise.
Now that I have a 5er, my Equal-i-zer is just sitting in the garage staring at me every time I walk in looking at me real sad, as if saying ... why did you abandon me for that fifth wheel beast! I keep reminding it that he's not going anywhere. He's home now and can just rest a while.