I am replacing my Polyurethane Shift Bushing in my transfer case. When I took out the shifter the bushing was not there but there was a rubber washer in there. My question is does this rubber washer go on the top or the bottem of the new bushing. Or is this used with a new bushing. I have looked at some manuals and did not see this washer. If anyone has a digram they could send that would help.