Which oil should I be using?

[showbeastie]

Hi

I've been giving my Rav4.2 (2lt petrol) a much needed service, replacing engine oil, filters and plugs. I now want to replace the gearbox oil, but I'm having a problem getting access to the drain plug. The closeness of the wishbone won't allow me fit a socket, and the fins on the gearbox housing itself seem to restrict using a spanner. It's driving me mad!

Also, I'm slightly confused as to what fluid I should be using on the rear dif. Is it different stuff from the gearbox oil?

Cheers.

[Devon Aygo]

Fluids required are:

Engine 4.2 litres 5w30 API SJ/SL "Energy conserving" / Oil filter = 90915-YZZJ2 / Sump washer 90430-12031/ Air filter 17801-28010 

Manual gearbox 3.4 litres SAE 75w90 GL5 Drain and fill plug washers 90430-18008 x 2

Auto gearbox 3.5 litres ATF T-IV  drain plug washer 90430-18008 x1

Transfer box 1 litre SAE 80w90 GL5 Drain and fill plug washers 12157-10010 x 2 

Rear diff' 1.0 litre SAE 80w90 GL5 Drain and fill plug washers 12157-10010 x 2 

Spark plugs are Denso SK20R11