The Eaton 509643 Cover Cup Seal Assembly is a differential pinion shaft bearing retainer for heavy-duty axle applications. This part is also cataloged under Spicer as EH509643 and cross-references to numbers including 2719-509643, 3949185, and DS509643, making it a widely recognized interchange across multiple sourcing channels. The assembly is sold individually (each) and serves as the sealing cover at the differential pinion shaft bearing location. Pro Gear and Transmission carries this genuine Eaton part. Not sure this is the right part for your application? Give us a call to confirm proper fit before ordering.
Features
Genuine Eaton differential pinion shaft bearing retainer
Part number 509643, also listed as Spicer EH509643
Cross-references: 2719-509643 or 2719509643, 3949185, DS509643, SP509643, ZBP0509643
Sold as individual unit (each)
Broad interchange coverage across Eaton and Spicer part number systems
