Quite a while ago I remember seeing a TSB from GM on a change on the "Bellhousing" hope I called the part correctly?? What it was about was they added a small lip to the housing in the spot where the front pump is installed. Can any one remember or have this TSB that explains this, would like to know if all the above is correct when was this change implicated and is there a way by reading the transmission tag that would indicate the change??