on the front of the gear box there is a plastic wing nut undo this and fill to the bottom of the hole
yes
The gearbox oil is separate from the engine oil on a 2002 1.4 Astra, and much thicker.
Gearbox and engine oil all one.
Yes, use exactly what the manufacture recommends in the engine and gearbox. gearbox oil is normally a much heavier weight of oil.
change the gearbox oil it is ATF.
how many liter of engine oil
no same oil both jobs
The gearbox and engine are one unit so therefore share the same oil.
change the gearbox oil it is ATF you have sticking valves due to dirty oil. and oil all linkages.
TD42 is the engine model, not gearbox oil.
CG125ES-4 is 1 litre for engine & gearbox
1 will be the engine oil pan (sump) the other will be the gearbox oil drain