Hi All. I am rebuilding my 68 Imperial Crown Convertible. I am at the rear end and it is leaking at the pinion seal. Is this seal easy to fix or should I take it to the shop to get it done. I just finished reading the story in mopar action on the rear end bearings and inner and outer seal replacement but it did not say anything about the 3rd member or the pinion seal. Any help I can get will be appreciated. Thank you . Bob. ps. I forgot to mention that the car has 139.715 miles on it.