Gearbox ZF 7DT-70

The 7-speed preselective robotic gearbox ZF 7DT-70 has been produced at a plant in Germany since 2008 and is installed only on charged modifications of the Porsche 911 with the Turbo and Turbo S index. There is a version of this PDK for rear-wheel drive cars 7DT70HL and all-wheel drive 7DT70HLA.

7DT family: 7DT-45, 7DT-70, 7DT-75.

Specifications

Production years since 2008
Type robotic transmission
Number of gears 7
Type of drive all wheel / rear
Engine volume, l up to 3.8
Torque output, Nm up to 780
Recommended oil Pentosin FFL-3 + PTX 75W-90
Oil capacity, liter 5.4 + 3.5
Replacing the oil every 60,000 km
Replacing the filter every 60,000 km
Gearbox lifespan, km ~300 000
Weight, kg 116

Gear ratios ZF 7DT-70

Using the example of a Porsche 911 Turbo S 2014 with a 3.8 liter engine:

Main 3.44
1st 3.91
2nd 2.29
3rd 1.58
4th 1.18
5th 0.94
6th 0.79
7th 0.62
Reverse 3.55

The transmission was installed on:

  • Porsche 911 VI (997) in 2008 – 2012;
  • Porsche 911 VII (991) in 2011 – 2019.

Disadvantages of the ZF 7DT-70 gearbox

  • The first years of production of the gearbox were famous for its jerky operation, but then the firmware corrected everything.
  • Now the main problems are caused by wear of solenoids and contamination of the valve body.
  • Failure of fluid pressure and temperature sensors is also quite common.
  • Not often, but still sometimes the speed and gear position sensors fail.
  • If driving aggressively, the clutch block will have to be replaced at a mileage of 50,000 km.

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