Electra Gearbox Sprocket Seal

I did on my Navigator, getting it out was ok, getting the new one in was a Pain! 

Dan 

One way to remove the seal is to drill a small hole in it, fit a self tapping screw and pull out the seal, as if you were drawing a tooth. Drill two holes opposite each other for more effect. Works the same on the crank seal behind the engine sprocket. To refit your new one, use a box spanner (like a socket, but longer). Works a treat.

Trouble is the case is often punched to retain the seal, that renders it no longer circular and difficult to get the seal in, same with main bearing seal.