What oil goes in the differential of a fiat 450 DT tractor?

The Fiat 450 DT tractor typically requires a high-quality gear oil or differential oil with a viscosity rating of SAE 80W-90 or SAE 85W-140, depending on the operating temperature conditions. It's essential to consult the owner's manual for specific recommendations, as it may also specify API GL-4 or GL-5 standards. Always ensure the oil used is suitable for the tractor's differential to ensure optimal performance and longevity.