C4 rear seal stuck

I was leaking a little bit from the rear transmission seal, so I decided to replace it. I started to pry it out with some flat screwdrivers, but it seems to really be in there. I hammered on it a little and the metal part of the seal started to bend out. I only got to work on it for 15 minutes before the wife yelled for me to come in. I wanted to know if any of you had any advice before I go back to work at it.