Here lately my driver and now the passenger window will make a real high pitched screeching sound when going down or up. What can I do to stop it?

 

spray some spray silicone lube down the trcks of the window... made mine go up and down faster too!

 

Mine does this on my expedition. The outside rubber sleave thing at the bottom of the window actually inverts as the window approaches the bottom. It makes a horrible screech. I've found that if I use my thumb and try and mold it/push it out it will stop for a few days/weeks. Sound stupid but it's the only thing I have to do to fix it.

 

^^ Did this myself when I had my door apart. You'll need to pull back that clear plastic liner on the doors after removing the plastic door trim, the tracks are kinda difficult to get to.