I think I have a rear main seal leaking on a 89. How hard is this to change. Never done one before. I just purchased this car, put it on the lift and saw oil everywhere. Can't tell exactly where its coming from, but I think rear main seal.Please let me know if it might be something else. I'm a member of the SSR Fanatic forum and love it. Hope this one is just as good. I would appreciate any help you can give me.