Follow the narrative to see how small design choices affect everyday performance. In this video, we demonstrate the installation and key features of the DANA 485 rear hub oil seal (OE 3104081-ZM01A), showing how its double-lip structure, spring self-tightening design, and premium materials provide reliable dustproofing, waterproofing, and anti-leakage performance for Dongfeng Tianlong and Tianjin heavy trucks. Watch to learn proper installation techniques and understand how this OEM-matching seal protects rear axle components and improves driving safety.