thanks chryco,
from the description, I must have the type with the two buttons, since in the other type it cant fall out.
I will have to pull it to put the buttons in as they must be missing.
Is the center pin hollow all the way thru so these buttons just but up against each other? If so, why two?
do they pilot on the axle ends somehow? Maybe I could put them on the axle end and then slide it in without pulling the diff again?
any idea where to purchase these buttons?
thanks again.