General information
Transmission
The 4-speed automatic transmission 01M is equipped with 4 hydraulically activated forward gears. When the lock-up clutch is closed these forward gears become mechanically driven gears by cutting-out the torque converter slip.
Torque converter
The torque converter is equipped with a lock-up clutch. The lock-up clutch is closed dependent on load and speed and drives 1st, 2nd, 3rd and 4th gears mechanically independent of slip.
In some cases, it may be necessary for installation of a new converter to remove the sleeve bearing from the turbine shaft. For instructions on performing this task. Refer to Torque converter, identification .
Self-diagnosis (On Board Diagnostic or OBD)
It is recommended that the self-diagnosis be performed before and after each repair.
Refer to 01 ON BOARD DIAGNOSTIC (OBD)
Transmission Control Module (TCM) -J217- with driving situation gear changes (Fuzzy Logic)
Determining the driving situation and driving resistance dependent gear change point happens automatically.
Advantages:
- Gear changes will be consumption orientated
- Maximum engine output is always available
- Individual adaptation of gear change points in all driving situations
- Gear change points are infinitely variable
Gear change point variations for hills
An additional gear change map automatically selects gear changes for hills dependent upon accelerator pedal position and driving speed.
- Gear change map for extreme uphill stretches is matched to engine output
- Gear change map for extreme downhill stretches is matched to the braking effect of the engine