How do you change gearbox oil on range rover sports?

To change the gearbox oil on a Range Rover Sport, first ensure the vehicle is on a level surface and safely elevated. Remove the drain plug from the gearbox to allow the old oil to fully drain out. After draining, replace the drain plug and remove the fill plug, then use a pump to add new gearbox oil until it reaches the appropriate level. Finally, replace the fill plug and check for leaks. Always refer to the owner's manual for specific oil types and capacities.