Revitalize your Western Star 5900 SBA with our selection of essential drivetrain parts. This category includes everything from universal joints and u-joint kits to differential pinion nuts and seals designed for reliable long-term performance. With easy installation and durable construction, these OEM-quality parts ensure your drivetrain operates efficiently. Whether replacing worn components or upgrading your drivetrain, these products help keep your truck on the road and performing at its best.