I just pulled this out of my 87 GN. Not sure what it is but hoping someone can ID it. It has a blue tag on it with numbers 288-891-ctf-0135.
Or if someone has a good source for finding out this info please point me to it.
dave
Try:
http://www.gnttype.org/techarea/pictureguides/tranny/transguide.html
I'd go over to turbobuick.com and ask Bruce Toelle (sp?), he should be able to tell you exactly what the tranny came from, he looked up mine for me, mine ended up having a weird tag because it was a dealer replacement, or something like that.