Might want to do more research on the oil used. Our G8 diffs are not the same as the camaro as far as fluid requirements. The G8 spec calls for a specific oil with a carbon additive. Head to the other board and search on Castrol SAF Carbon Mod+. Based on info from that board, there is not a cross reference to another supplier. It may be dated info, but it may be worth looking into. The carbon additive is not the same as the friction modifier that can be added for generic LSD's.
9.5 RPM (Red Passion Metallic) Sport /Premium
"Experience is what you get when you didn't get what you wanted."- unknown
All it takes is a little imagination, some mechanical ability, and neighbors who mind their own business. -red green