I talked to several shop folks, service manager types etc. etc. and what I came up with is this; Equaflex was a Lippert attempt at providing a cushioned suspension - their first and not their best. The Road Armor was an attempt to improve the Equaflex and compete with MorRyde.
I removed a virtually new Road Armor suspension system and replaced with a MorRyde SRE4000. Why? In all conversations with the above non biased individuals (I hope) the MorRyde was always the top choice if you didn't mind spending the money. Watching this trailer with the previous Road Armor the trailer just did not appear to ride as smoothly as my previous trailer with the MorRyde suspension. I HATED to spend the money to do it but I am very happy I did.
For you, with that size trailer and those small shackles, no wet bolts, EqualFlex suspension etc........I would dig into axle size, springs, shackles etc. and just fix it up. JMO
Danny & Susan wife of 54 years
2019 Ram 3500 Laramie CC SB 6.4 4x4 4.10
2020 Montana High Country 331RL