We check the oil level on a cooled gearbox, setting the car on a flat horizontal surface.
With a spanner wrench "13", we unscrew the plug of the control hole in the gearbox housing.
With a normal amount of oil in the gearbox, its level should reach the lower edge of the control hole - check with your finger. If the oil level is significantly lower than required, then it is necessary to add oil to the gearbox. You can add oil from the bottom of the car - through the control hole using a special syringe for gear oil or from above - through the hole in the gearbox housing for the breather using a hose and funnel.
To top up with oil..
... in the engine compartment we find a breather screwed into the hole in the gearbox housing.
Remove the protective cap of the breather.
We loosen the breather with a high head "by 17"..
... and turn off the breather.
We insert a hose into the hole in the gearbox housing, through which, using a funnel, fill in gear oil until it starts to flow out through the control hole.
We wrap the stopper of the control hole.
Before installing the breather, check its condition.
If the breather holes are clogged with dirt, clean them.
We wrap the breather and close it with a cap.