I completely disassembled it, cleaned it up and inspected everything. I don't know if the pin was missing or if it hit the floor and rolled somwhere when I pulled it all apart. I can't find it.
I have to find a speedo drive gear too. It is a little rough and is chewing up the plastic speedo gear. Otherwise, the T-case looks good. I'm going to reseal it and run it.
If it doesn't hurt anything I may run without it.