Materials Needed: Gear oil of the correct grade.
Support the car so that it is in a horizontal position. Inspect gearbox for leaks.
Unscrew the bolt for filling oil in the gearbox.
The oil level should be 10-15 mm below the edge of the fill hole. To check, you can use a piece of wire as a probe.
Gear oil specification: 75W90 synthetic gear oil) (Mazda 121: SAE 80 High Pressure Gear Oil) or Ford-WSD-M2C200-B gear oil.
Filled volume: 2.8 l.
For pouring, you need a special syringe or hose. Do not fill in a lot of oil at one time, because. it spreads slowly.
Tighten filler bolt to 25 Nm.
Lower the car.