Where is the oil top up plug for the gearbox on a ford escort 55 van with a 1.8 diesel engine?

The oil top-up plug for the gearbox on a Ford Escort 55 van with a 1.8 diesel engine is typically located on the side of the gearbox casing. It is usually a hexagonal plug that can be accessed from the side of the vehicle. To check or add oil, you may need to raise the vehicle for easier access. Always ensure the vehicle is on a level surface for accurate oil level readings.