The Dana Spicer Speed Sensor, part number DR0.0012101 or DR00012101, is designed for off highway axle applications. The sensor falls within the driveline and axles category and is sold individually. Pro Gear and Transmission carries this as a genuine Dana Spicer part. Call us to confirm proper fit for your specific axle configuration before ordering.Interchanges:Allison Off Highway LYDR0.0012101FeaturesDana Spicer part number DR0.0012101 or DR00012101Designed for off highway axle applicationsSold as individual unit (each)Genuine Dana Spicer part available through Pro Gear and Transmission