Taz 6 Y Axis Creak

Hi All!

I am starting to experience a strange creak on the Y axis. Only seems to be in a certain spot when moving down in value (towards back). Here is a link to the video!

I have checked all parts for cracks and for any loose screws. Seems to be getting worse. Could it be the stepper? Belts too tight/loose?

Went thru all the screws and tightened things down. Seems to be coming back. Any suggestions would be rad!