GF27.10-P-0001ACL Automatic Transmission (AT), Function

GF27.10-P-0001ACL Automatic transmission (AT), function
- 722.618/646/694/696


Function description
Transmission 722.6 is an electronically controlled 5-speed transmission with a lockup clutch in the torque converter. The ratios for the gear stages are achieved by 3 planetary gear sets. The 5th gear is designed with a step-up ratio as an overdrive. Shifting is electronically actuated, whereby the gears are shifted by the corresponding combination of 3 hydraulically actuated multi-disk brakes, 3 hydraulically actuated multi-disk clutches and 2 mechanical overrunning clutches.

Transmission 722.6 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):
- Electronic selector lever module control unit (/)N15/5
- CDI control unit (N3/9) (on diesel engines)
- ME-SFI [ME] control unit (N3/10) (on gasoline engines)

Via the chassis CAN (CAN E) with the interface of the CDI control unit or ME-SFI control unit, data are exchanged with the following control units:
- Instrument cluster (A1)
- ESP control unit, except code (233) DISTRONIC PLUS (N30/4) ESP control unit [Electronic Stability Program Premium control unit], with code (233) DISTRONIC PLUS (N30/7)
- Front SAM control unit with fuse and relay module (/)N10/1
- Electronic ignition lock control unit (N73)
- Steering column module control unit (N80)

Further partial functions are described in separate documents:
^ Transmission control, function
^ Shift-lock, function
^ Gear shift, function
^ Power flow, function