Abnormal sound of Great Wall Haval h6 manual transmission The abnormal sound of Great Wall Haval h6 manual transmission may be caused by: abnormal sound of transmission gear is usually caused by too low or deteriorated transmission oil level, too large or too small gear meshing clearance and poor gear meshing. When the meshing clearance is too large, the driving gear will hit the driven gear when it rotates, which usually becomes more serious with the increase of transmission temperature. When the meshing clearance is too small, the abnormal noise is usually continuous, some even and some uneven. The faster the vehicle speed, the more serious the abnormal noise, and the transmission lubricating oil is often overheated.
Gear noise is sometimes caused by gear tooth surface collision, which is uneven and rhythmic. The bigger the throttle, the louder the noise, and when it is serious, the vibration of the transmission will be felt. The gear noise of the transmission is caused by the low precision of the gear when the transmission is manufactured, or the replacement of the old gear with a new gear when the automobile is repaired, or the improper operation causes poor meshing. This kind of noise is that the faster the speed, the louder the noise, the higher the temperature, the thinner the lubricating oil and the louder the noise, which will gradually decrease or disappear after running-in. Abnormal sound of transmission rolling bearing is usually caused by excessive bearing clearance, or the tight fit between bearing inner ring and shaft, outer ring and transmission housing. If the bearing ball has cracks or spots, it usually makes a broken sound.
When diagnosing the cause of abnormal sound of transmission, we should first distinguish the occurrence law of abnormal sound, and further judge the possible fault causes and solutions according to the situation. If the car is idling or driving, you will hear abnormal noise from the transmission in the cab. Possible reasons are: insufficient transmission oil or oil deterioration; The transmission bearing is worn, loose or damaged; Bending of transmission shaft; Gear meshing is abnormal, and the meshing clearance is too large or too small; Metal on the gear tooth surface is peeled off, teeth are broken or assembly dislocation is repaired; The grooves of the shift lever and shift fork are loose.