General information about automatic transmission (Opel Vectra B)

The four-speed electronically controlled automatic transmission consists of a torque converter, epicyclic gear train and hydraulically controlled clutch and brakes.

Torque from the engine to the gearbox is transmitted through a torque converter, which functions as a fluid clutch and acts as an automatic clutch. It also provides torque transmission during acceleration.

The gear transmission provides forward movement in one of the 4 gears or reverse movement. The components of the gear transmission are controlled by brakes and clutches, which are actuated hydraulically. A pump located in the gearbox provides the necessary hydraulic pressure for the operation of the brake and clutch.

The gearbox is controlled by a selector lever with 7 positions. Position D provides automatic gear selection from 4 forward gears. The automatic downshift mechanism changes the gear to a lower one if the accelerator pedal is pressed all the way. This mode should be used when maximum acceleration of the car is required. If the selector lever is in position 3, the car will move only in the first three gears, and in position 2 only in the first two gears, etc. Setting lower gears is desirable for engine braking, when driving downhill or to prevent unwanted selection of a higher gear on winding roads.

Due to the complexity of the automatic transmission, any repairs must be carried out at a service station.

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