[NeedAntiVenom]

Rick,

Two tubes, 8 Oz. total, of GM additive, the diff will take about 2 quarts of lube. I had some chatter problems - fixed with two tubes of antislip and Moroso climbing gear lube as ERA recommended.

The PowrLok is a little different than most LSDs because it has ramped cross shafts that compress the clutch pack as more power is applied.

Hope this helps.