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2.4 Gear shift mechanism
The G91/70 is a sequential gearbox with six forward gears and one reverse gear. Gear
shifting is performed using two shift paddles located on the steering wheel and a
pushbutton on the instrument panel connected to the steering wheel. Pull the right
paddle to up-shift and the left paddle to down-shift. The reverse gear is engaged by
pressing the "Reverse" pushbutton on the steering wheel and release the clutch.
Information
Paddle Shift
The paddle shift system is used by the driver to change gears and to protect the drive
train against incorrect handling. Shift paddles on the steering wheel, pass electrical
signals to the Bosch engine control unit when they are actuated. The shift request is
evaluated in the Bosch ECU and transferred to the APS control unit. The compressor
integrated in the APS unit generates compressed air and stores it in the unit's pressure
reservoir. When the shift request from the paddle is transferred to the valve block by
the controller, the gear shift cylinder engages the required gears. The system pressure
is between 6 and 6.7 bar (87.0 – 97.2 psi). If system pressure falls below 6 bar (87.0
psi), the compressor is switched on automatically.
Version: 4/20/2018
The "Emergency Gearbox" switch is located on the
center console. This switch is used to continue
operation in case of sensor failure. Refer to chapter
2.4.3.
Powertrain
2.4.1
2.4.3
2.4.2
911 GT3 Cup (991 II)
MY 2018
75
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