The original door glass in my Ford was broken and nasty on the passenger side and the driver's glass was missing entirely. So I started pulling the doors apart.

 The old glass run channels were present but all the soft material had rotted away. This allowed the windows to rattle and bang around and led to all the glass busting and being noisy as all hell while driving.

The window garnish and dash in my old Ford looked pretty ratty. When I got the car none of it was attached. It was all just sliding around inside the scraping against things and adding to the general clattery, clangy din of racket that lost its appeal pretty soon after the first-drive-excitement wore off.