Dana Spicer 25901003 is a thrust spacer for driveline assemblies. A thrust spacer handles thrust loading within a heavy-duty drivetrain assembly, so the parts around it stay where they belong under load. This is a genuine Dana Spicer part from Pro Gear and Transmission. Match 25901003 against the number on the spacer you are replacing, and if you are unsure which one your assembly takes, call us and we will help you confirm proper fit.FeaturesDana Spicer part number 25901003Thrust spacer for driveline assembliesHandles thrust loading within a heavy-duty drivetrain assemblyGenuine Dana Spicer part