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!
You need to take the center of Park brake hub off. I believe it was an 1 and 1/8 socket to remove the nut. Slide the drum off and you'll have access to the shoe and hardware. Be sure to replace the seal and o-ring. You can buy the assembly from TVH if necessary.
Hey Todd,i saw your post a little bit while searching for info, i know its been awhile and you never got a answer but i wanted to ask, i assume you got your problem figured out, i am working on a C500 s 100 , is that true the parking brake is inside the tranny? and how does one go about reaching that? or does the tranny and engine need to come out,im sorry to bother you with this but any help, no matter how little would be appreciated, thank you.