We check the oil level on a cooled gearbox, setting the car on a flat horizontal surface.
With the "13" head, we unscrew the plug of the control hole in the gearbox housing..
... and remove the cork from the hole.
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 funnel.
To add oil from above, in the engine compartment..
... with the "17" key, loosen the breather tightening..
and turn off the breather.
We insert a funnel into the breather hole of the gearbox housing..
... and fill in gear oil until it starts to pour out through the control hole.
We wrap the stopper of the control hole.
Before installing the breather, check the condition of its holes. To do this, remove the cap from the breather.
If the breather holes are clogged with dirt, clean them.
We wrap the breather and close it with a cap.