Excellant description, that is most likely the trouble if it comes from the bell housing area. Marbles in a coffee can slightly muffled by liquid. LOL LOL LOL :Thumbup: 1250 is right on, begins to quiet when stator free wheels. Torque converter only will fix it if the tranny is otherwise good.racehauler said::welcome2: to TDG
Could be the torque converter making the noise. A lot of times they sound like there is pieces rattleing around inside when they go out.
RacerX would probably have some more insight on this problem. He is on vacation right now and will only be reading on here now and then. You might want to send him a pm to let him know about your thread.