when i get the dash loom in i wont be able to refrain from taking it for a drive.!

was talking to a toyota mechanic today, he told me to check if my car needed gbox and diff oil. i dont think it does as it only had one outlet.
but if anyone could clear that up it would be awesome.
box is e52 non lsd
also ive run into trouble with the spedo drive. ae92s are cable, and my cars ae101 = problem,
so i doubt ill have a speedo drive for a while so this brings me to another question.
if there is no speedo drive in the gbox will gbox oil piss out of this hole, or is it a completely different place?
btw e52 speedo drives are horizontal.
cheers