I just got my rotating ring in the mail for my NP241 and had a few questions. First off do you use a seal(gasket?) on each side of the ring? And after looking at it im a little up in the air as to how it even installs, maybe it will explain itself once I get under my truck and pull the transfer case. But has anyone done a tech article or have any pictures or able to describe to me how to install it? Thanks for any help or advice!