I have a spare original 9" third member with 4.11 gears and a spool (I think). Should I get rid of it...If so would anyone on here be interested? I bought a rebuilt member with a 3.50 posi, but I don't want the spare to just sit in my garage and rust. What do you guys think?

 

Do you now how many Spline's 20 or 31?

 

The third member accepts a 28 spline axle.