looking at the diagrams on realoem, it looks like there is a profile gasket between the oil pan and the diff.

my question is in regards to the tapered metal ring listed with the o-ring. #8 on the diagram listed as "assembly ring". is this ring needed for install of the oring?

any comment on installation would be helpful. i've ordered a new gasket and o-ring.

alternator bracket is off the car and reassembly to start in the next few days.

thanks in advance.