Just curious in terms of the comments above about using the right "
Oil and "Limited slip additive".
For my 50+ year old Jaguar LSD, after I had it serviced as part of my rebuild, I was told to use a specific
synthetic for the first 500kms and then to drain and fill with an AMS
oil and only do changes thereafter every 10 years.
These comments came from the jaguar specialist that originally serviced the diff, so I am assuming the bloke knew his stuff in terms of the right oils and grades.
So the question I guess is more around the additives comment.
If the right oils had been specified why include an additive?