Find affordable Peterbilt 386 Drivetrain parts that boost your rig's resale value. Keep your Peterbilt running strong with top-notch drivetrain parts. From durable U-joints and precision differential components to premium seals and gaskets, this lineup has everything you need for smooth, efficient performance. Whether you're replacing worn parts or upgrading, these reliable components are built to last and fit perfectly. Stay road-ready with this must-have collection for your 386!