Daewoo Nexia

Since 1994 of release

Repair and car operation

Daewoo Nexia
+ The maintenance instruction
+ Maintenance service
+ The engine
+ 3. The engine (two top camshafts)
+ Cooling system
+ Fuel and exhaust systems
+ Electric chain
+ 7. Ignition system
+ 8. The electronic block of management and gauges
+ Transmission
+ 10. A five-speed transmission and the main transfer RPO MM5
- 11. Automatic Transmission
   11.2. The terms, the accepted reductions and abbreviations
   11.3. The general description of transmission
   11.4. The basic knots of a transmission
   11.5. Methods of localisation of leaks of a working liquid
   11.6. Check of level of a working liquid in transmission 4T40
   11.7. Diagnostics of malfunctions of knots of transmission
+ Steering
+ Running gear
+ 14. A forward suspension bracket
+ 15. A drive of forward wheels
+ 16. A back suspension bracket
+ Brake system
+ Body
+ Heating, ventilation
+ Electric equipment

11.3. The general description of transmission

The table of inclusions of elements of management of a transmission


Arrangement of electromechanical and electronic devices of transmission


The unit 4T40 is intended for переднеп риводных cars and represents automatic transmission with электронногидравлическим management. In transmission the transmission with four transfers of a forward course (including one transfer – raising) and one transfer of a backing is established. Management of a transmission carries out electronic БУТ by means of two executive ЭМК switchings. The hydraulic system of transmission eats from лопастного the pump. Pressure of a working liquid in system is regulated БУТ by means of the electromagnetic valve of a regulator of pressure (ЭРД).

The automatic transmission can work in one of seven ranges:

Р (Parking) – Mechanical blocking of a target shaft of the transmission, preventing spontaneous movement of the car. With a view of большей safety range Р joins on parking simultaneously with a lay brake of the car.

R (Backing) – Inclusion of transfer of a backing.

N (Neutral) – Neutral position of a transmission is used at start-up and engine work on the motionless car. This range joins also if necessary to start the decayed Engine on the moving car.

D (Movement) – the Range is used in all usual traffic conditions of the car. The range provides automatic switching of all transfers of a forward course and management of blocking ГТ. Дли fulfilment of the confident and safe overtakings hill-climbing gear inclusion by full pressing an accelerator pedal is applied.

3 – the Range is applied at trips on a city, at movement in hilly district or trailer towage. The range provides automatic switching of 1st, 2nd and 3rd transfers. Inclusion of 4th transfer is impossible. Compulsory inclusion of hill-climbing gears is made similarly to range D by full pressing an accelerator pedal.

2 – the Range provides автомати ческое to switching of 1st and 2-2-transfers. It is used for intensive dispersal and intensive braking. The range 2 can be included on any speed of the car.

1 – Inclusion of 1st transfer. The range 1 is used in need of intensive braking by the engine. To a transmission can be included in a range 1 on any speed of the car, but inclusion of 1st transfer will occur only after decrease in speed of the car to 48–56 km/h.

Automatic Transmission 4T40 consists of following basic knots.

Mechanical knots of transmission:

– The hydrotransformer with a blocking friction clutch;
– Chain transfer;
– Five multidisk friction clutches (2nd transfers Ф2, backing ФЗХ, 3rd transfer ФЗ, braking by engine FTD and transfers of forward course ФПХ);
– Two tape brakes (2nd and 4th transfers Т2/1, 1st transfer and ЗХ.Т1/ЗХ);
– Three муфты a free wheeling: two roller МСХ (1st and 2nd transfers) and one кулачковая МСХ;
двухрядная planetary transfer;
– The main transfer with differential;
– The management valve in gathering. The lopastnyj pump.

Electromechanical knots and electronic devices:

– The electromagnetic valve of a regulator of pressure (ЭРД);
– Two electromagnetic valves of switching of a transmission (ЭМК);
ЭМК with shirotno-impulnoj modulation of a signal of management ФБТ;
– The gauge of speed of an entrance shaft of transmission (ДВВ);
– The gauge of speed of the car (ДСА);
– The gauge of temperature of transmission (ДТТ);
– The block of the relay of pressure (БРД);
– Electric conducting.