You need Castrol syntrax 75w140 and redline friction modifier. I dunno where you can get the friction modifier. I think I got it from couture auto. The syntax you can get in any good motor factors. You add 4%, of the friction modifier to the total amount of fluid the diff takes.

So for example. 4% of 1000ml = 40ml
So 960 ml oil and 40ml modifier.

I can't remember what the diff capacity is. I think 1.1l