As odd as it sounds I carnt find the filler plug for the gearbox lol.Ive drained the old stuff out.Im on the look out for some titan oil or this fuchs stuff

Look between the intercooler and turbo, you'll see a dipstick for the gearbox. You also have to fill it through that. A funnel and peice of hose comes in handy

Standard transmision service oil we use for your average Subaru is Castrol Syntrax 75/90 (now branded as universal)

A better oil that has helped in past experience is motul 300 75/90.

Motul 300 has made a long term difference on a couple of boxes we tried it in.