Gearbox ZF 8DT-55

The 8-speed preselective robotic gearbox ZF 8DT-55 has been produced at a plant in Germany since 2019 and is installed on basic modifications of the Porsche 911 in the 992 body, such as the Carrera S and Carrera GTS. There is a version of this PDK for rear-wheel drive cars 8DT55HL and all-wheel drive 8DT55HLA.

8DT family: 8DT-55, 8DT-80.


Production years since 2019
Type robotic transmission
Number of gears 8
Type of drive all wheel / rear
Engine volume, l up to 3.0
Torque output, Nm up to 600
Recommended oil Titan FFL-8 + PTX FE 75W-80
Oil capacity, liter n/a
Replacing the oil every 60,000 km
Replacing the filter every 60,000 km
Gearbox lifespan, km ~300 000
Weight, kg 128

Gear ratios ZF 8DT-55

Using the example of a Porsche 911 Carrera 2020 with a 3.0 Biturbo engine:

Main 3.12
1st 4.89
2nd 3.17
3rd 2.15
4th 1.56
5th 1.18
6th 0.94
7th 0.76
8th 0.61
Reverse 3.99

The transmission was installed on:

  • Porsche 911 VIII (992) since 2019.

Disadvantages of the ZF 8DT-55 gearbox

  • As always, in the first years of production there were problems with shocks and everything was treated with firmware.
  • You need to regularly update the lubricant or you will have to clean the valve body at 100,000 km.
  • For an overly active owner, the clutch block may wear out up to 50,000 km.
  • It is also necessary to note the very high cost of a new gearbox.

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