Green Axles.

I am changing out my 3:55 pos for a 3:23 open in my driver Dart. The 8 3/4 has Green Axle bearings. I have read up on this and am more confused now than I was then. This washer in the spider gear section they say has to come out or leave it in , it's a pin, I see no washer or washers.
So what's the deal?