no I have used aftermarket lube.
The problem if its is a problem was before lube change .
I seen guys not use posi lube and get chattering from it but I never had a chatter problem before or after lube change
No filings in the old lube I took out
Are there springs in the center of the spider gears to load the posi ?
I will do some burnouts later today and try it
Then I will try the MB snake oil as you said.