Gear lube?

FWIW, I used this in my '05 clutch 9-1/4" corporate LS......
upload_2021-5-26_14-45-55.png

It was clicking and chattering all the time with it. Stopped at the dealer for a bottle of the Mopar stuff, got it in, and it stopped all the click-n-chat.

This also works well............

Friction Modifier for Limited Slip Differential/Posi/Suregrip (doctordiff.com)