1.7L gearbox and around 1.3L for t series diff. diff will be easy because you just fill it through the back and when it overflows you know you have enough. i'v always filled my gearbox through the shifter and there is no way of knowing if you have enough oil in there so i measure it before i pour. or if you can actually undo the overflow on the side of the gearbox you can just fill it till it overflows from there