Inspection of a 904 torqueflite

glhx said
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A999 worn down....output shaft support -

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I think the output shaft support is worn down due to the .023 play in the governor area......a new and thicker snap ring should fix this.

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Here is the 904.....the okay here is .016.......much smaller than the one above. I forget the spec. Will post it tomorrow

The thrust washers were .049

The thick one was .125 on part of it and .122 on part of it. It has the snap ring groove run down int it

If the output support sealing ring area is scored or worn heavily you can swap that part from your 904 or any other 904 lockup or not.
I am not sure what the arrows or endplay you are referring to on the governor support. That should not be a wearing area. It appears you are pointing to snap rings and not thrust washers. The little bit of play you are referring to is normal and nothing to worry about.