904 Transmission Stopped Going Into Gear

Making steady progress.

Question:

Am I missing something for my kickdown servo assembly?

20180904_183613.jpg

Im pretty sure this is everything that came out of the kickdown bore during disassembly. The rebuild book and pictures online show a piston? Did I lose a part?

Is this just how they are for 1971? Is this a "load controlled" vs "non load controlled thing"?