Probably bad/cheap quick struts. We had a 94 with new front struts, and it bottomed out in shallow mud puddles! Good springs are always a must with these vans.
Check lower ball joints for looseness. Inner and outer tie rod ends often wear and cause looseness and clunking. The sway bars on 2nd gens are pretty trouble free, as there are no end links and it's all contained in the steel front cradle. Rubber bushings can get oily and degrade, but that's it.