1-4 are the same ratios, OD varies between .62, .68, and .72. Reverse is 3.38 except on the TCET2070 and TCET5852 versions (4.38). According to Tremec http://www.ttcautomotive.com/english/media/pdfs_autogen/TR-3650.pdf
My 2002 GT has the .62 OD gear, although I'm not sure exactly which...