Introduction to Maserati
Maserati GranTurismo
3. Transmission The automatic transmission of the Maserati GranTurismo has been engineered to offer the best possible compromise between performance, driving comfort and fuel economy. It consists of the following components: ZF 6HP26 automatic 6-speed gearbox: hydraulic gearbox with torque converter, lock-up clutch and integrated control unit (Mechatronic). Various driving modes are offered: fully automatic gearchange in normal, sport or ice mode, or manual sequential gear selection by use of the gearshift lever or gearshift paddles at the steering wheel. This gearbox is mechanically identical to the one used in the Quattroporte Automatic. The controlling software is specific for the Maserati GranTurismo to enhance the sporty character of the vehicle (faster gearshifting). Composed transmission shaft: the transmission shaft is composed of a front and rear part and uses three homokinetic joints. This solution was chosen because of a slight desaxation between the gearbox output shaft and the differential input shaft, both in the horizontal and in the vertical surface. The transmission shaft is sorter as the one used in the Quattroporte Automatic due to the sorter wheelbase. Note: the transmission shaft requires a balancing procedure after the removal of transmission components (gearbox, transmission shaft, differential). This balancing procedure is identical for GranTurismo and Quattroporte Automatic. Graziano limited slip differential: with respect to the differential of the Quattroporte Automatic, the final drive ratio has been changed. This was done to improve performances and reduce differential noise. Note: see chapter 3 “Mechanical Components” for more detailed information on the individual transmission components.
Maserati Academy
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