4spd:
Early TC had the 336 transaxle.
72.02...2150R (federal), 72..3...020Q (export) and 72.03...1444P (UK) and up have 352 transaxle.
5 spd:
72.08...1101Q (export), 72.08...1783P (UK), and 72.16...268R (federal) and up had the option of having the 365 transaxle.
AFAIK, and according to period press reports, you could get specials with 4 spd transaxles. It may have depended (speculation alert!) on the market.