Sound fine to me, if u want, you can use ford LSD stuff its only 7 dollar, and I think gm one is 12 dollar ? ford lsd stuff have more addictive in it. and it cheap.
Note i use lucas 80w90 hd gear oil with ford lsd addictive, after few thousand mile, no complaint yet, only thing i want to change cause of the brand new lucas, other then that gear oil work fine, just dont like the brand name lucas lol. BTW I would just keep on driving for 1k miles or so, mine does make some noise but after 1k miles driving , no noise and smooth as [censored]. Mabe gear oil need breaking in.