What cause gearbox leacking oil?

Gearbox oil leaks can be caused by several factors, including worn or damaged seals and gaskets, which can deteriorate over time due to heat and pressure. Loose or damaged drain plugs and faulty vent plugs can also contribute to leaks. Additionally, excessive wear on internal components can lead to increased pressure and oil seepage. Regular maintenance and inspections can help identify and address these issues before they lead to significant leaks.