Q-system is an automatic gearbox with a manual shift option. It was installed on Alfa Romeo 156 cars equipped with V6 2.5-litre engines with 190 hp and 192 hp outputs, which were manufactured from 1999 to 2005. It was built on the basis of the Aisin AW50-40LE (AF14) 4-speed gearbox.
The Q-system offers three automatic modes: City, Sport, and Ice. In addition, drivers can switch to full manual and control the transmission themselves. Is it worth noting that, unlike most automatic transmissions with manual control, the Q-system features H-pattern gear-shifting, as in manual transmissions, making it more intuitive to use. Moreover, there are no electronic controls that interfere with manual-mode driving in order to protect the transmission from error, which has a huge positive impact on vehicle dynamics.
Common malfunctions of the Q-system
- The drum of the friction clutch coupling is prone to crack.
- The hydraulic torque converter and driveshaft seals start to leak prematurely.
- The mechanical parts of the transmission wear out fast if the transmission fluid level is too low.