AGAIN

Due to a very poor parts selection including o rings in the slave adaptor to the tranny

but it is all good this time because my 6 speed Richmond was also leaking up front, just like the above trannies

It was almost dry when the shop pulled it....if I had kept driving it I would have had no tranny.... apparently it was delivered to me like this because it was dry when first inspected/repaired! Good thing I only drove her around the neighborhood when i took delivery, and that I stopped driving her recently when the clutch started acting wimpy...We suspect that the leak could be the retainer as you say, but it also could be the front leading edge of the sealant. We are cracking the case and going to clean it up, inspect the internals and re-seal it , with new input output seals as well.
We are solving the slave cylinder problem by using AN fittings, which is what it SHOULD have had from the factory

not some hokey o-ring system that has now blown out twice (It was delivered with the o-ring blown out and part of my acceptance of it was the repair.. but the parts themselves were NOT correct, as we have now concluded.
Has anyone called Richmond? I did, and they tech (NOT a toll free # by the way

) said he could not imagine the sealant could leak... but I think it's like the proverbial 3 monkeys.. see no leak, hear of no leak, and speak of no leak
Try calling them and see what they tell you.. ( 864-843-9275 ) I think it's a design flaw and we should have redress.. my tranny did this from day one !!!