2012 911 Section 3-1 11/3/11 10:18 AM Page 83
911 Carrera 911 Carrera S
3 Power transmission
3.1 General The 911 Carrera (991) features a 7-speed manual transmission as standard, which is unique in the sports car segment. The transmission is essentially derived from
Power Transmission
the Porsche Doppelkupplung (PDK), with the gear ratio of the 3rd and 7th gears adapted to take account of the manual gear changes. The 3rd gear has a higher
3
ratio, which reduces consumption. The 7th gear has a lower ratio to maintain the tractive force even at comparatively low speeds.
The optional Porsche Doppelkupplung (PDK) is based on the unit familiar from the previous models, but has been systematically enhanced for the new 911 Carrera. It combines the sportiness of a manual transmission with the comfort of an automatic
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transmission, while further improving efficiency.
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On the following pages you will find a description of the 7-speed manual transmission, followed by a description of the changes in the area of the double-clutch transmission. General
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7-speed Porsche Doppelkupplung
Clutch
84
(PDK)
99
7-speed manual transmission
84
General
99
Technical data G91/00
84
Coasting function
99
Shift mechanism
85
Neutral via paddle
101
Locking
89
Auto Start Stop system
102
Gearshift lock for 7th gear
91
Thermal management/lubricating
Gear wheel set
92
oil supply
Synchronization
94
Controlled rear differential lock
Drive
95
(CRDL)
106
Differential lock
95
Wiring harness
107
Oil circuit
96
Transmission control unit
109
Neutral detection sensor
98
Porsche Doppelkupplung (PDK)
109
103
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