Rear End Issue

I was checking for a vibration in my driveline. I had the car up on jack stands and ran the car in drive. The wheel on the drivers side would turn, stop and turn again. It does this intermittently. The right side is okay. I have 3.23 gears with posi. When I drive, I would sometimes hear a clicking sound on the left rear side at low speed. I posted a link to the video.
Author: money pit