Hi Everyone. mk, if you're interested here's a couple of YouTube vids on posting photos to FordBarn. They show basically the same thing with the second one offering a few more options. First 4 minutes, second about 8.
Without photos it'll be hard for the members to chime in with any really good information.
T-98 tells most of the story but is this on the top cover or on the main case? Some T-18 transmissions have T-98 on the shift tower housing. There were several types of T-98 as well.