What gear oil is for the t4 1.9?

For the Volkswagen Transporter T4 with a 1.9 engine, the recommended gear oil is typically a 75W-90 GL-4 or GL-5 gear oil. It's important to check the vehicle's manual for specific requirements, as different models and years may have slightly different specifications. Always ensure that the oil meets the manufacturer's standards for optimal performance and durability.