Genuine Eaton Snap Ring P/N: 129433. We have Eaton differential parts, new in box ready to ship worldwide. For help please call one of our experts!Used in these Dana Spicer models40 Series Single Reduction Tandem Drive AxleDS404 / RS404 Tandem Drive AxleDS405 Tandem Drive AxleDSH40 Tandem Drive AxleDSH44 Tandem Drive AxleDSP41 Single Reduction Drive AxleDST40 Tandem Drive AxleDST41 Tandem Drive Axle