The Dana Spicer O-Ring, part number 001.05.3989 or 001053989, is a genuine sealing component for off highway axle and driveline applications. This part is also cataloged under the Allison Off Highway line, making it a cross-application seal used in heavy-duty driveline assemblies. Sold individually, it is the correct replacement when seal integrity in the axle or driveline assembly is the concern. Pro Gear and Transmission carries genuine Dana Spicer parts to keep your equipment running to spec. Not sure this is the right O-ring for your application? Give us a call to confirm proper fit before ordering.FeaturesGenuine Dana Spicer part number 001.05.3989 or 001053989Also cataloged as Allison Off Highway LY001.05.3989Designed for off highway axle and driveline applicationsSold as an individual unit (each)Driveline and Axles category fitmentTech SpecsPart Number: 001.05.3989 or 001053989Vendor Part Number (Allison Off Highway): LY001.05.3989Application: Off Highway Axle / DrivelineUnit of Measure: Each