318 rear main seal replacement

Read through here and it sounds like you have gotten some solid advice. Speedo cable has 2 O rings..simple fix. Your initial pic is of the pan and not rear main seal. Further along Inertia posted a pick of the rear main seal that is rubber. With those tabs I an not sure how you would replace without motor out of car....you can's slide that sucker. I just installed those on my 318 build. I agree with DaveBonds...drive it, spring is coming and it you may be better off to wait until you plan to make some upgrades on drive train! Good luck!!