The Q2 cannot be fitted onto Alfas with 5-speed gearboxes and that includes all TS/JTS models, as well a V6TB engined models with 5-speed gearboxes. This is because the "Fiat" transmission's ring gear is larger in dia. than the "Alfa" (V6/JTD) one, so they are not interchangeable.

An exception is the later V6TB engined models with 6-speed gearboxes, that have an "Alfa" transmission. Also in 5-speed models the 6-speed transmission can be retrofitted, along with the Q2 of course. It appears that the bellhousing pattern is the same in 5-speed and 6-speed models in V6TBs.