There is a hub that the drum mounts to , the bolts you removed were to hold drum onto hub
Remove the nut from center of drum that will allow you to remove the drum assy
Be sure and put a big drain pan under before you remove the assy as there will be trans fluid loss and while out replace seal and o ring
Good luck!
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.