I have a used Auburn E Locker Electric Locker for sale this will fit a Dana 35 axle it was in the rear of a 2002 Jeep Tj but it will fit many other vehicles and years. $500 or make offer
Ebay ad below
I also have both axle shafts I could add in from 2002
I also have a complete rear end drum to drum from 1997 Tj Dana 35 4.10 gear open diff for sale
This is for 3.55 ratio and up 3.73 4.11 and so on
This is a clutch type posi unit in normal mode or is a 100% full locker when you flip the switch best of both worlds
Here is a link to a new unit you can read about and look up application
This sell new for $800 plus handling fees.
This did brake one axle shaft and scratched up the inside of one side I took a picture of it this will not affect the unit in any way.
I can add pictures if needed