[Dave W]

Check the spring(s) under the u-bolt plates. I suspect that you will find that one or both main leaves are broken. Also, make sure that the spring hangers are verticle to the frame, not angled. Lastly, make sure that one or more of the spring eye bolts is not broken along with verifying that there are still bushings in those eyes. HC Montanas are not ysuallysupplied with wet bolts OE. The original bushings are good for about 3-5000 miles before they are 'gone'

As far as that CRE3000, that is probably not your problem unless it was assembled incorrectly with the center bolt now either broken or, as I found on ours, that bolt wasn't set in the nut side right - but we had no problems as yours shows.

Springs are inexpensive at about $30 apiece (etrailer) plus a set of 9/16" U-bolts along with a set of wet bolts and an easy DIY project with minimal tools needed.