Peugeot 406

Since 1996 of release

Repair and car operation

8.2. An automatic transmission

THE GENERAL DATA

Models with petrol engines in volume of 2.0 litres can be equipped by the computer which operates the four-high-speed automatic transmission consisting of the hydrotransformer, a tooth gearing and гидравлически operated coupling and brakes.

The transmission copes the electronic control device (ECU) which receives the signals concerning operational modes of a transmission from various gauges. On the basis of this data ECU can establish optimum speeds of movement of the car according to a driving manner.

The twisting moment from the engine to a transmission is transferred through the hydrotransformer which carries out function of liquid coupling and operates as automatic coupling, also providing twisting moment transfer at acceleration.

The tooth gearing provides advance on one of 4 transfers or movement by a backing. Tooth gearing components cope brakes and муфтами couplings which are put in action гидравлически. The pump located in a transmission, provides necessary hydraulic pressure for work of a brake and муфты couplings.

Management of a transmission is made by the lever of the selector having 7 positions. Position "D" provides an automatic choice of transfers from 4 forward transfers. The automatic mechanism of fall of transfers switches transfer to the lowest if the accelerator pedal is pressed against the stop. This mode is necessary for using, when the maximum acceleration of the car is required. Transfer fall like other functions of transfer also copes ECU. If the selector lever is in position "3", the car will move only on first three transfers, and in position "2" – only on first two transfers etc. Installation of lower transfers is desirable at braking by the engine, at movement from biases or for prevention of an undesirable choice of the higher transfer on twisting roads.

In addition three programs of movement operated the switch to the left of the lever of the selector, provide the additional control with the driver of transfer according to road conditions. In position "Normal" the transmission works in a usual automatic mode. In a mode "Sport" the gear change occurs at higher turns of the engine. In a mode "Snow" in position of the lever of selector "D" car movement begins with the second transfer.

In сязи with complexity of an automatic transmission any repair should be made at station Peugeot.