General

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 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 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 transmission, while further improving efficiency.

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. Power Transmission 3

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General

83 Clutch 84 7-speed manual transmission 84 Technical data G91/00 84 Shift mechanism 85 Locking 89 Gearshift lock for 7th gear 91 Gear wheel set 92 Synchronization 94 Drive 95 Differential lock 95 Oil circuit 96 Neutral detection sensor 98 7-speed Porsche Doppelkupplung (PDK) General Coasting function 99

Neutral via paddle 101

Auto Start Stop system 102

Thermal management/lubricating oil supply Controlled rear differential lock (CRDL)

106 Wiring harness 107 Transmission control unit 109 Porsche Doppelkupplung (PDK) 109