5-438X Universal Joint U-Joint For Mack Heavy Duty Truck

5-438X Universal Joint U-Joint For Mack Heavy Duty Truck This 5-438X universal joint is a heavy-duty drivetrain component designed as a reliable replacement for Mack trucks, precision-machined with high-strength alloy steel and sealed bearing cups to lock out dust, moisture and contaminants; it delivers consistent torque transfer at varying angles, resists shock loads and premature wear, maintains smooth driveshaft operation, and helps prevent vibration and driveline failure