Automatic transmission — general information (VW Golf 1)

The automatic transmission works as follows: between the three-stage planetary transmission and the engine there is a torque converter, in which the engine torque is transmitted to the impellers through a fluid flow. When the engine is running, the pump wheel connected to it creates a flow of ATF fluid. In this case, the fluid presses on the blades of the so-called guide wheel, which changes the direction of the ATF fluid flow. Thanks to this, the turbine wheel connected to the transmission is set in rotation.

In an automatic transmission, the gear ratio is changed by connecting various gear wheels via a hydraulic control system. This occurs depending on the engine speed and the position of the accelerator pedal.

Position "E" of the control lever

A technical feature of the automatic transmission of diesel Golf or Jetta models is an additional position of the control lever, which promises a certain fuel economy.

When the control lever is in this position, the transmission torque converter operates in slip mode (for example, downhill without pressing the accelerator pedal). Thus, this is the very "free movement" that a bicycle has. The large braking effect of a diesel engine is not very noticeable, the car goes down roads with small slopes with fuel economy or moves by inertia in front of traffic lights or barriers.

If the car was moving quickly in this mode and then the accelerator pedal was pressed sharply, this can lead to a noticeable jerk of the car forward. A smooth increase in engine speed is more comfortable and saves fuel.



The original information is posted on the resource VWMANUAL

Note. The planetary gearbox gears are constantly in mesh, and the fluid in the gearbox always tends to rotate the drive wheels when the lever is in the "D" position with the engine running. That is why the Volkswagen moves slowly even at idle speed. Position "E" corresponds to the state when the engine is disconnected from the gearbox.

Note. In extreme cases, it is possible to try to start the engine from a tow. To do this, pressure must be created in the hydraulic system of the automatic transmission, and the oil must be pumped well. The car must move at a speed of 30-40 km / h for 3-5 minutes. The engine is ready to start. The gearbox lever is in the "N" or "E" position. Then the lever is moved to the "O" position and the accelerator is pressed sharply (kickdown). After starting the engine, move the control lever to the "N" position.