How to replace a rear seal on a 4L60E trans

'94 C2500. I'm replacing the flex plate and decided to replace the rear trans seal while I'm at it. I have the new seal, but can't figure out how to get the old seal out.

Any pointers?

Here is your tool for the job. God luck :-) http://www.harborfreight.com/seal-puller-91352.html