Same transmission...

'97 SE/GT's had the weak vacuum powered 4T60e...you want to stay far away from them...
'97-'02 GT/GTP's had the 4T65E (GT) and 4T65E-HD (GTP)...gearing is said above^^
'03's had the 4T65 BUT...can't be used in any other '97-'02 car because the internal electronics and valve body is different.