rear shackle bushings

After replacing rear leaf springs , shackles , and shocks.. All was well at first. Then after a couple days I noticed if shifting around and bad thunk noise . To my surprise the upper bushing in the frame on just one side is able to slide over about 1/4 inch . Other side is fine but basically...

So much information out there, thought I'd consolidate some for the group!! (Note: my bushings are a *****).... 1997 Ford Explorer leaf spring bushing kit by Daystar….. ($42.05) http://www.carid.com/1997-ford-explorer-suspension-systems/item-1477600.html Energy Suspension Parts.com (Rear...