So after installing the one piece driveshaft the sounds is still there, along with a much worse noise. It only happens when I'm driving very slow and is worse when backing up. I'm assuming it's the differential considering there was some metal shavings on the drain plug when changing the fluid. There was also metal shavings on the transmission drain plug, and for some reason shifting is worse after changing the fluid. I used Redline 75-90 GL4 in the trans and Valvoline 80-90 GL5 in the diff, the car was level when I changed them. Here's a link to a video of the sound the car is making.
https://youtu.be/5Tf3Ktu5jS0