I have seen the little hole on the bottom, it looks to small for any big chunks, but im sure there is clutch material all over inside the tranny. i will clean it the best i can and go have fun this weekend, this is our last trip to the dunes this year. i will plan on winter teardown including going thru the motor, ie: seals, better clutch, rings, i would like to polish the covers, but if im doin a good clutch and i win the lottery i will buy a lock-up with a polished cover. i will put it together tonite and let everyone know it works.