Sorry to hear about the leak coming back and that you have to take the pan off again for the rear seal, make sure you get that seal in correctly its very easy to damage the seal putting it in and if you do you won't know it until it's all back together and still leaking. That is what happened to me, still have the leak just have not had the time to redo the job. It sounds pretty simple to put that seal in but trust me its easier to damage it than to get it in correctly. I am not sure exactly how to get it in and don't know exactly how to use the little white tool that comes with the seal, thats why I still have a leak. I am sure someone can give more detailed instructions. I just slid the new seal in place as I removed the old one it went right in but still leaks so I did something wrong. Well lots of words but not much help, let me know how it goes I am going to attemp this myself one more time.