Daewoo Nexia

since 1994 of release

Repair and car operation

Deu Neksiya
+ Maintenance instruction
+ Maintenance
+ Engine
+ 3. Engine (two top camshafts)
+ cooling System
+ Toplevnaya and exhaust systems
+ Electric chain
+ 7. Ignition system
+ 8. Electronic control unit and sensors
+ Transmission
- 10. Five-speed transmission and main RPO MM5 broadcast
   10.2. General description
   10.3. Diagnostics of malfunctions
   10.4. The possible reasons of the increased noise of a transmission
   10.5. Check of level of transmission oil
   10.6. Adjustment of a drive of the mechanism of switching
   10.7. Gear shifting lever
   10.8. Floor mechanism of management of a transmission
   10.9. Draft of the mechanism of management
   10.10. Intermediate lever
   10.11. Speedometer drive
   10.12. Cover of the mechanism of the switch
   10.13. Consolidations of semi-axes
   10.14. Transmissions assembled
   10.15. Dismantling of a transmission and main transfer
   10.16. Characteristic malfunctions of a transmission and possible reasons
+ 11. Automatic Transmission
+ Steering
+ Running gear
+ 14. Forward suspension bracket
+ 15. Drive of forward wheels
+ 16. Back suspension bracket
+ Brake system
+ Body
+ Heating, ventilation
+ Electric equipment


10.4. The possible reasons of the increased noise of a transmission


Often noise from such sources as tires, bearings of naves of wheels, the Engine, system of production of the fulfilled gases wrongly is accepted to transmission noise. The noise level in salon can change largely as it depends on the sizes of the car, and also type and quantity of applied shumoizoliruyushchy materials. The transmission, as well as any shesterenny mechanism, is not absolutely silent. Therefore work of a serviceable transmission always accompanies ся small noise. For check of noise level of a transmission under way автомоби ля it is necessary to execute the following:

1) To choose a road site with an equal asphalt covering for reduction of the noise created at a kacheniye of tires, and level of resonant noise in car salon.

2) Run of the car to warm up to normal working temperature all units of the car.

3) To write down value of speed of the car and number of the included transfer at which the increase in noise is observed.

4) To check noise existence at operation of the engine idling and the motionless car.

5) To define, in what of modes of movement the increased noise is observed.

5а) Dispersal – smooth or sharp.

5б) Uniform movement – car movement with constant speed at small coal of opening of a butterfly valve on the horizontal road.

5в) Braking by the engine – car movement with the included transfer and partially or completely closed butterfly valve.

5г) On all the modes listed above.

Noise of bearings

Noise of bearings of the main transfer can be easily confused with noise of bearings of wheels. As bearings of the main transfer have a preliminary tightness, their noise should not decrease considerably at work of a transmission and rotation of the hung-out driving wheels. For noise of bearings of wheels that it proceeds and at car movement nakaty on a neutral in a transmission is characteristic. As bearings of wheels have no preliminary tightness, their noise considerably decreases at rotation of the hung-out wheels.


For бринеллнрованил bearings clicks or the knocks which frequency approximately twice is less than frequency of rotation of a wheel as rollers move more slowly are characteristic.

Brinellirovaniye is a consequence of action of the big forces pressing bodies of a kacheniye (balls or rollers) in a bearing ring. Thus on a path of a ring deepenings are formed. Brinellirovaniye is observed at a press fitting of a ring of the bearing on a neck of a shaft or in a case nest if force is put through a holder with bodies of a kacheniye and the second ring. Brinellirovaniye is called also by the vibration operating on a case detail in which the bearing or a rotating shaft is established. An external sign of a brinellirovaniye is existence on a surface of a racetrack of the bearing of the small dents doing it similar to washing board. Operation of the defective bearing is accompanied by strong noise of low tone.


Lapingovaniye is called by small abrasive particles of scale, sand, corundum, etc. materials which are transferred by oil. These particles cause development of racetracks and kacheniye bodies подшипни ков. The defective bearing can have considerable люфт, but smoothly work. The reason of a lapingovaniye is car operation on the polluted oil.


Jamming of bearings occurs at hit on a racetrack of large alien particles. These particles can jam bodies of a kacheniye and give to проворачи a vaniya of one of bearing rings. Unduly big preliminary tightness of conic bearings also can cause their jamming.


The petting, or dot vykrashivaniye of surfaces of a kacheniye, is a consequence of normal fatigue wear at long action of cyclic contact tension. The Pitting can become also a consequence of the wrong installation of the bearing or develop after introduction about contacting surfaces of firm alien particles.


The Spolling, or scaly vykrashivaniye and cracking of surfaces of a kacheniye, is a consequence of an overload or the wrong installation of the bearing (not coaxiality, a distortion of rings or unduly big preliminary tightness).