Hey! This thread is reminding me.
When we picked up our '95 E250, there was a heinous, incessant knocking sound that would come from inside the front passenger door as you drove along. Worse than Chinese water torture on a long drive.
Finally tore the door panel off and found that one of those factory rivets for the window motor was improperly (incompletely) fastened...it wasn't bottomed out snug against the sheet metal....so it let the whole window motor assembly rock around and make a hell of a lot of noise.
Drilled out the offending rivet and replaced it with some leftover threaded hardware from one of my mountain bikes. (Yep, a nylock nut on there....)
NO idea how the last two owners had put up with that endless knock-knock-knock racket for the 20 years before we got this van...!
PRICELESS:
The look of stunned and happy relief on my girlfriend's face when we took the next trip...and she realized that the crazy sound was gone.
Btw:
Congrats BrianBlair!!!!