1480 U-JOINT

It belongs to the 1480 series, which is a common size for many commercial vehicles. This U-joint is greaseable, meaning it has a grease fitting that allows for regular lubrication, which is essential for prolonging its service life under high-torque, high-mileage conditions. You would typically replace this part when you feel vibration during acceleration, hear clunking noises from the driveline, or upon inspection find excessive play or rust at the bearing cap seals.