Description: Dana 35 C-Clip 7.56”
Axle Shaft Diameter: 1.18”
Gear Ratio: 3.54 & up
Detroit Locker Part #: 162C56A
That is the current part number, I've had this thing since 2003, I have no idea when the PO bought it, so i guess the part number could have changed.
I'll post up if I find anything else out.