S80 or Y80 tranny?

I have a 95 GSR and i was wondering what tranny it is. I was looking at my car and noticed it said S80, but in the December 2000 issue of SCC (the engine swaps), it says that the 94-01 GSR is supposed to have the Y80. I was just a little confused. It's not a big deal, i would jus' like to know which one is supposed to be in there. Thanks.:D