Ok I finally have enough money to install the gears and t-lock I bought about a month and a half ago and I have all the parts I need to install it, bearing kit from mustangtuning.com, and royal purple, but I've read that I need a friction modifier. Royal purple says that I dont need any other additives, is that the case? If not where do I buy the right synthetic friction modifier like the one from ford or the brand equitorque because our good friends and O'Reillys and Autozone dont carry it either one?

 

You dont need it. Its in the royal purple already.

 

Alright thats what I was kinda guessing, thanks man.