Differential/Gearbox fluids
 

Is there a link/sticky that has the amounts and fluid specifications (GL-4 vs GL 5, viscosity) for the TT 5 and 6 speed cars?

Front diff and gearbox share fluid, so I assume GL-4 (brass safe, to protect the synchros). Redline MT90 or MT85 for example?
Center and Rear diff I assume no brass in there, so GL-5 is fine. 75W90?

What quantities?