Here's the fleabay link to the Jeep 4.10. It's a Spicer unit. In the notes u will see a X-ref to 2007772 part #
http://www.ebay.com/itm/RING-AND-PIN...hSFk5t&vxp=mtr
Now here's a Spicer D44 4.10 from Jegs. Manuf # is 2007772
http://www.ebay.com/itm/Spicer-20077...1W5waf&vxp=mtr
One describes a 12 bolt while the other appears to be a 10 bolt. HMM.