Last year the Ford 97 F53 under my 98 Itasca I started hearing a metal rattling in the rear. I checked it out and found that one rubber bushing was missing and the other in bad shape. I Googled “Ford F53 sway bar bushings”, found several places that have them & they are very inexpensive. I ordered a set and replaced them myself (easy job). It made a WORLD of difference. The wobble when a semi passed was virtually gone and the overall ride improved. The front ones appear to be A-OK for now.
Dave Bates