do I need an additive in my 8 3/4 sure grip?

Just read this TSB on the Hamtrack site regarding misuse of plate type limited slip gear lube.

http://www.hamtramck-historical.com/images/TSBs/1969/69-3-4.jpg

Found some discussion at the end of an old thread FABO................

http://www.forabodiesonly.com/mopar/archive/index.php/t-206595.html

Some folks must remember. So does friction modifier actually hurt the cone LSD?