Strange clicking noise…

So I tried to upload a video but it won’t let me for some reason but basically here’s the issue.
I have the bike in park. Hold the back bumper and rock the bike back and forward and the rear axle where it connects into the rear diff clicks….
If I hold collar in the pic where it meets the rear diff u can feel it click while rocking the bike…… Normal? Problem? Ideas?
Thanks fellas

Attached Images
File Type: jpg image.jpg (98.8 KB)

Strange clicking noise…

So I tried to upload a video but it won’t let me for some reason but basically here’s the issue.
I have the bike in park. Hold the back bumper and rock the bike back and forward and the rear axle where it connects into the rear diff clicks….
If I hold collar in the pic where it meets the rear diff u can feel it click while rocking the bike…… Normal? Problem? Ideas?
Thanks fellas

Attached Images
File Type: jpg image.jpg (98.8 KB)