Once again: The suspension system was completely worn out. shackles, bolts, springs, equalizer.
All were replaced with E-Z Flex, wet bolts, bronze bushings, 4 leaf springs, because I was on the road and a long way from home...............
The 2015 Nash 22H had 10,000 paved road miles and no dirt or off road miles.
Northwood advertises this trailer as: "Northwood built/certified/off-road chassis"; therefore if 10,000 paved road miles is all it gets then I find it not acceptable. It seems I have no recourse.
Thank you to those who tried to help.