whenever i drive over broken pavement, The doors sound like they are knocking against the car, and sometimes on a hard stop they'll do that too, but i feel around where the doors meet the frame, and there is no movement whatsoever. I cannot be the only 92-99 owner who has experienced this. any ideas?

You are positive that it'* the doors making this sound an not something else?

If so, which doors do this?

well if it'* not the doors, then it must be a ghost in the roof, it is the weirdest thing. all of them do it. idk of the chassis must be getting old and weak or what.

Check it out

does a chassis wear out that much? yikes!

Not usually..however we have recently had a couple of subframe to body mounts rust out or come apart.