How do you change oil in the gearbox on a L200?

To change the oil in the gearbox of a Mitsubishi L200, first ensure the vehicle is on a level surface and securely lifted. Remove the drain plug and allow the old oil to fully drain out. Once drained, replace the drain plug, then fill the gearbox with new oil through the fill plug until it reaches the appropriate level. Finally, check for leaks and dispose of the old oil properly.