How to check gear box oil t4 1.9?

To check the gearbox oil in a T4 1.9, first ensure the vehicle is on a level surface. Locate the fill plug on the gearbox, usually found on the side or top; remove it using the appropriate tool. With the engine off, insert a finger into the hole; the oil level should be just below the fill plug. If necessary, add the recommended gearbox oil until it reaches the proper level.