So I finally got around to replacing the driveshaft center support bearing, after the old one was completely destroyed. I noticed that the joints of the driveshaft was a stiffer that it should be and a tech advised me to put some multi-pupose lube in there. that helped.

I noticed that when i drive the car, i head a pigeon/dove like sound when the driveshaft is in motion. What could that be? How do i know when i need a to replace the driveshaft?