How to change output shaft bushing?

[blackfire93]

Ok, so I just finished putting my transmission back into my car from having to replace the front seal. Now the rear seal is acting up since I put a LS1 driveshaft on. I replaced the seal and it still leaks. My Chilton's manual says that if it continues to leak then it is a sign that the output shaft bushing is going bad. My question is where is the output shaft bushing, do I have to remove the tranny to get to it, and how hard is it to put a new one in? Thanks for your time and help.