Dreaded clunk when turning

I want to update and conclude this thread. Few things I wish I had known before I started.
Parts list:
Motive C7.25BI $80 gears (amazon)
Felpro RDS12775 gasket $8 (amazon)
REN 67031 Hammer Slide free (oreilly)
REN 67032 Hub puller free (oreilly)
2 bottles of Lucas Synth 75-90 gear oil. $24 Pep Boys

diff gear - 1.jpeg