Ragetty1, Did you just add a short piece of 3/8" rope to the area where the factory foam is or did you run and new longer piece into the channel between the A and B pillars? And did the foam rope go on top of the small piece of factory foam or did you force it down into the area between the window and the foam piece? Thanks!
I already had the 3/8 rope running the full length in the channel, and then I noticed the gap/hole that the factory foam square didn’t fill, so I then cut a small piece and stuffed it into the hole.
So I have both: a small 1inch piece stuffed into the actual hole and a full length in rge channel.
Since the foam sits inside the channel nobody can see it, but it’s not the prettiest fix in the world. It worked for me!
If I had to guess I think for my situation sealing the hole would have solved the whistle on my passenger side door since that’s what finally cured it.
Driver side door didn’t have the visible hole next to the factory foam piece. The whistle was cured once I put the full length of 3/8 rope in this window sweep channel (and ensuring the ends are snug on both the from and rear ends.
I think doing the full treatment of all the window seals has helped in reducing overall noise too. Since a full treatment pushes all the seals against the glass for a tighter seal it would make sense I suppose. (?)