Help! Axle Play

I don't know but for some of you that do, is there a slug spacer that goes between the axles in the center section? On the 8.75 if useing the stock bearings there is a slug spacer. If useing green bearings the slug is not needed. Not sure on the 8.25. 1/4" seems a little excessive. I'll get to the shop today and i'll check the book for any pointers.