You may want to try this first, call a couple of local tranny shops and see if they have the seal tool for this. Its really quite simple and fast and they shouldn't charge a whole lot. I'm not a shop but I have them, you simply remove the lever and use the tool to remove the seal, it has threads on the outside that catch the metal body of the seal and pulls it out, reverse it to install. Before I got my own the last guy charged me I think like 30-40 bucks, well worth it in my opinion, good luck.