like what do they do how much are they used....im rebuilding my trans right now and i got the C2s out but the snap ring that holds the C1s in is being a pain, i just cant get it out, so what do C1s really do, i have after market ones but with the trouble its giving me i dont mind not replacing them if its not necessary, but i do have lots of metal shavings around the C2s and C1 clutch packs.