You are likely correct on the melted plastic. some do have a plastic washer between the hub and fwd drum. Replacements I have bought are metal.Thank you for the reply,
Well, maybe it used to have a plastic one that had tangs and went on the front ring gear hub? Perhaps the last person to work on it did not clean it up, that would match the rest of the quality of work.
I saw a picture on the net of a forward clutch assembly apart and the washer in the photo was plastic with looked like 3 tangs.
I forgot to mention I think the forward piston was not working proper because it had a round inner oring instead of a square one like the others. May have not fit right and was harder.
The centre seal in the forward drum is meant to be a round section o'ring.
Be sure during assembly to test each sealing ring one at a time for adequate drag on install