What about the differential?I think I replaced the right side only but it was a junkyard used part
I don't know exactly what the issue is but in the video on the passengers side you can see the cv boot at the differential out of round. It matches the noise as it spins.I did not replace that.
It's hard to say what is wrong just looking at the video. I'm not very knowledgeable about working on these mustangs. I've worked on cars all my life & do know the cv axle should not wobble like that. The clicking sound is the same I have heard from bad cv have shafts I have changed on front wheel drive cars. If you figure it out update us what fixed it!Maybe I'll try a new cv axle. The old one was bent