Automatic transmission (AT), function - GF27.10-P-0001GGA
TRANSMISSION 722.902 in MODEL 463.306/336/346 up to 31.5.12 as of Model Year 2011/YoM 10
TRANSMISSION 722.904 in MODEL 463.202/222/236/237 up to 31.5.12 as of Model Year 2009/YoM 08
TRANSMISSION 722.902 in MODEL 463.303/340/341 up to 31.5.12 as of Model Year 2009/YoM 08
Automatic transmission (AT), general
Transmission 722.9 is an electronically controlled automatic transmission with seven forward gears and two reverse gears. The ratios for the gear stages are achieved by planetary gear sets. All the transmission functions and components for this transmission are combined in one assembly module.
The integration of the electric controller unit (VGS) (Y3/8) in the transmission means that the interfaces to the wiring harness have been minimized. This improves the shift quality, increases the service life and reliability and also lowers maintenance costs.
The transmission can be subdivided into the following assemblies:
- Torque converter with torsional damper and torque converter lockup clutch
- Oil pump for generating the necessary oil pressure and for reliable lubrication of the actuators and bearing points
- Transmission housing with mechanical transmission components (planetary gear sets, park pawl, multidisk clutches and multidisk brakes) and controller unit
Data is exchanged with the following control units via the drive train CAN (CAN C):
- Instrument cluster (A1)
- CDI control unit (N3/9) (on diesel engine)
- ME-SFI [ME] control unit (N3/10) (on gasoline engine)
- ESP control unit (N30/4)
- EZS control unit (N73)
- Steering column tube module (N80)
Further subfunctions are described in separate documents:
- Transmission control, function
- Key-P function
- Gear shift, function
- Power flow, function
| Automatic transmission (AT), location of mechanical parts | GF27.10-P-0001-07GGA | ||
| Automatic transmission (AT), location of electric/electronic components | GF27.10-P-0001-08GGA | ||
| Automatic transmission (AT), location of hydraulic components | GF27.10-P-0001-09GGA | ||
| Automatic transmission (AT), technical data | GF27.10-P-0001-19GGA | ||
| Automatic transmission (AT), block diagram | GF27.10-P-0001-20GGA | ||
| Transmission control, function | GF27.60-P-2002GGA | ||
| Key-P function | GF27.10-P-3028GGA | ||
| Gear shift, function | GF27.60-P-2000GGA | ||
| Power flow, function | GF27.10-P-2009GGA |