A-727 small metal debris in pan - rebuild?

MungoMopar said

There is a new twist to the story... Please see pics
The shuttle valve primary spring has a piece of tube inside, this looks alien and must limit shuttle travel. The ends of this tube are mushroomed over and worn badly.
On page 44, Monroe says that "The shuttle valve controls kickdown "feel" by restricting how fast the fluid is released from the front clutch pack and the outside of the front servo".
I don't see this piece in Monroe's book; has anyone ever seen such a thing?
Is it potentially from a shift kit mod?

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One of the b&m shift kits calls for the removal of the shuttle valve spring and the installation of the rod behind the shuttle valve. (or leaving the spring and adding the rod)
What it is supposed to do is block some of the accumulator function making the shifts firmer.

It sounds to me like someone screwed up somewhere in the VB, and those screwups can be really tough to track down.
I'm not saying there isn't a reasonable explanation for the way it's working but it could save you a lot of grief to look for a different VB.