What are the causes of abnormal noise on the rear axle of a car?

The reasons for the abnormal sound of the rear axle of the car are as follows:

1. The amount of gear oil is insufficient or the viscosity decreases;

2. Improper adjustment of the tightness of the supporting bearing;

3. Improper adjustment of the gear clearance of the final reducer;

4. The gear is worn too much or damaged;

5. The differential planetary gear, half shaft gear or half shaft spline is worn too much or damaged.

6. The half-shaft or half-shaft casing is bent, and the two rub against each other.

Rear axle squeak phenomenon.

1) Abnormal sound of improper tooth side clearance of the final reducer:

When the final reducer starts or shifts gears, there is a metal impact sound; When the speed of the vehicle is stable, the impact sound becomes a continuous noise, which is generally due to the excessive clearance after the tooth side is worn.

When the accelerator pedal is refueled or relaxed, there is a continuous "sizzling, sizzling" sound at the final reducer, which is mostly caused by the gear meshing gap is too small (or poor meshing), and it is accompanied by heating. The cause of this is severe wear of gears and splines, or improper tooth clearance, as well as insufficient lubricating oil.

2) Abnormal sound of uneven tooth clearance:

The main and driven gear pairs of the final reducer should be kept at a certain clearance, and if the clearance is uneven, it will also cause abnormal noise. For example, when the car starts or the speed changes sharply, there is a rhythmic "choking, choking" sound; At the same time, when the car is turning, the rear of the car body is accompanied by a phenomenon of shaking, which is usually caused by the gear clearance.

What is the reason for the abnormal sound on the rear axle of the car? Experts with a lot of experience will teach you the solution.

Analysis of the cause of abnormal noise on the rear axle of automobiles.

1. Improper sound of tooth side clearance. Under normal circumstances, the preload of each bearing of the final reducer is normal, when the car starts for a short time or when changing gears, there is a metal impact sound at the rear axle, and when the speed is stable, the impact sound becomes a continuous noise, and when the throttle changes sharply, the rear axle appears rhythmless"Click"、"Click"rattle, which is generally due to excessive tooth clearance; If the car is driving at low speed, there is"Whew"The sound of a fire engine's siren, similar to that of a fire engine, is present when accelerating or decelerating"Jaw-dropping"and the phenomenon of heating on the rear axle, which is generally due to the small gap between the teeth. The cause of the above abnormal noise is the serious wear of the gear and spline, or the tooth side clearance is too large or too small, or the lubricating oil is insufficient.

2. The sound of uneven brake clearance on the tooth side is rhythmic when the car starts or the speed changes sharply"Choked"At the same time, when the car is turning, the rear of the body is accompanied by the phenomenon of shaking, which is usually an abnormal sound caused by uneven tooth side clearance. The screws of the differential housing are loose, the hoe of the driven gear ring gear (some cars are screws) is loose, and the gear is deflected and runout when working, which causes the tooth side clearance to be large and small, which is the direct cause of the uneven tooth side clearance.

3. When the car is driving, if the speed is higher, the louder the noise, and the sound decreases or disappears when coasting, which is generally caused by bearing wear or gear clearance disorder. If the speed of the vehicle changes sharply or the sound is made when going uphill, the gear engagement gap is too large.

4. When the accelerator pedal is stepped on, the car runs normally, and the "woo" sound is made in the process of relaxing the accelerator pedal, and the sound disappears when driving at a constant speed, which is generally due to the looseness of the fastening nut of the protruding edge of the active bevel gear.

5. If there is a violent sound at the rear axle of the car while driving, it is mostly due to gear tooth damage or bearing damage. The sound of "click, click" when the car turns, can also be heard when driving in a straight line at low speed, and the sound disappears after the speed increases, which is generally caused by the excessive meshing clearance of the differential planetary gear or the wear of the half-shaft gear and keyway. When the speed of the vehicle is close to 60km h, when the throttle is retracted, there is an abnormal "hulong, hulong" sound at the rear axle, and the rear axle is shaken, which is caused by the bending and deformation of the half-axle casing.

6. If the car finds that there is a sound on the rear axle, you can stop and erect one side of the rear axle, mark it on the tire and the transmission shaft with a colored pen, and then hang up the gear, so that the engine runs at the lowest stable speed, and listen to the number of rings inside it within a certain period of time. If the number of rings is slightly more than a multiple of the number of wheel revolutions, it may be that the cone follower gear is oscillating, and the specific cause may be that the cone follower gear is running or malfunctioning.

First of all, the car is driven on the flat road for a certain mileage, so that the working temperature of the rear axle rises to normal, and then when the car makes an abnormal noise, write down the speed, after stopping, put the transmission in the neutral position, and then slowly accelerate until the speed of the engine is equivalent to the speed when the abnormal noise occurs, observe whether there is any abnormal noise, and can be repeated several times to determine whether the abnormal noise is caused by the abnormal condition of the exhaust or the engine.

Distinguish between tire noise and rear axle noise.

Tyre noise varies with the road surface, but not rear axle noise. When the speed of the car is below 48kmh, the rear axle noise disappears, while the tire noise continues. The noise of the tires is the same when the car is driving and coasting, but the noise on the rear axle is different.

Differentiation of squeak and noise of wheel bearings and rear axle noise.

When the car is driving and coasting, the noise of the front wheel bearing remains unchanged, if the speed of the vehicle remains the same and the brake is applied slightly, the wheel bearing can reduce part of the load, so that the noise can be reduced, and the noise source can be found.

When the speed is greater than 48kmh, unless the rear axle is seriously damaged, the noise of the rear wheel bearing can rarely be heard under normal circumstances, when the car is coasting or neutral, the cracked rear wheel bearing will produce a "rumbling" sound, and the corroded rear wheel bearing will make a "rustling" sound.

Distinguish the abnormal noise of the reducer tapered active bearing and the differential bearing.

The reducer bearings usually produce a harsh "rumble" or "rattle" sound, and the sound beat is stable and changes with the speed of the vehicle.

The sound of the front bearing of the bevel driving gear of the reducer is louder when the car is coasting, and the noise of the rear bearing is louder when driving.

The noise of the differential bearing is usually a constant harsh sound, but its beat is much more tempered than that of the reducer tapered drive gear bearing.

Noise resolution of rear axle gears.

In a normal straight line, the noise is not audible because there is almost no relative movement of the differential half-shaft gears and planetary gears.

During the driving of the car, the reason for the abnormal sound of the rear axle gear is mostly caused by poor lubrication, which leads to the reducer gear grinding scars, if the abnormal sound can be heard at various sliding speeds, it means that it is caused by the loosening of the nut of the reducer driving gear.

At low speeds, there is a knocking sound on the rear axle, and when accelerating or decelerating, it makes a particularly dull abnormal sound. The cause of the above fault can be found in one or more of the following places:

Improper clearance between the differential half-shaft gear journal and the differential housing.

Improper mating of the differential cross shaft journal with the differential housing.

The backlash between the half-shaft spline gear and the differential half-shaft gear keyway is improper.

Improper meshing backlash between the half-shaft gear of the differential and the planetary gear.

Improper backlash of the differential cone active and passive gears.

Thrust washers are worn.

When the vehicle is moving, the abnormal noise on the rear axle is due to improper clearance of the gear mesh, improper adjustment of the differential bearing preload, or both. When eliminating abnormal noise, it is necessary to disassemble and check the meshing gap between the differential gear and the reducer gear, the preload of the reducer bevel driving gear bearing and the contact traces of the reducer gear.

1. The amount of gear oil is insufficient or the viscosity decreases;

2. Improper adjustment of the tightness of the supporting bearing;

3. Improper adjustment of the gear clearance of the final reducer;

4. The gear is worn too much or damaged;

5. The differential planetary gear, half shaft gear or half shaft spline is worn too much or damaged.

Fault phenomenon: abnormal noise fault analysis of automobile rear axle: according to the analysis of fault phenomenon, it may be abnormal sound of the wheel axle.

The final reducer is abnormal. Abnormal transmission noise. Tire noise.

Clutch release bearing sound troubleshooting: according to the sound query fault point, see whether it is the engine part, or the chassis part, or the transmission system fault, according to the fault point to further check the damaged parts, replacement, you can.

1. The front bearing and rear bearing of the driving shaft of the final reducer are abnormal; 2. The bearings at the left and right ends of the passive shaft of the main reducer are abnormal; 3. The meshing of the main and passive teeth of the main reducer is abnormal and abnormal (the gap is too large, and the meshing point eats the big head or eats the small head); 4. The meshing clearance of the planetary gear mechanism is abnormal, and the shaft sleeves of the gear mechanism are loose; 5. The final reducer (rear axle) lacks lubricating oil; 6. Half-shaft splines and spline sleeves are loose, etc.

Abnormal turning noise, generally the differential sound, straight driving sound, generally the gap is too large, disassemble and check, the gap is OK.

Analysis of the cause of abnormal noise on the rear axle of automobiles.

1. The amount of gear oil is insufficient or the viscosity decreases;

2. Improper adjustment of the tightness of the supporting bearing;

3. Improper adjustment of the gear clearance of the final reducer;

4. The gear is worn too much or damaged;

5) Differential planetary gears, half-shaft gears or half-shaft splines are worn too much or damaged to the rear axle of the car squeak solution.

If it is caused by insufficient gear oil or the decrease in the viscosity of gear oil, it can be improved by changing the oil, adding enough oil or changing to single-grade oil or a higher viscosity level of oil.

Ask what is going on with the abnormal sound on the rear axle of the light truck.

The sound of decorating the goods is particularly loud.

Brake squeak caused by brake pad wear.

Abnormal noise from tire bearings.

Abnormal noise coming from inside the differential.

An unusual noise coming from the rear of the vehicle.

It is recommended to check whether there is a loose outside, such as the body frame, if there is no loose, then you need to cancel the vehicle to carry out a positioning inspection, check whether the tire bearing is abnormal or whether there is an abnormality inside the differential, if you are the owner himself, it is recommended that you go to the dealer or repair shop for further inspection. I hope my answer is helpful to you.

Hello, you need to lift the vehicle tires to check.

The question is very quiet, and it can be heard too quickly.

The more you pull, the louder it gets.

Visually checked, no problem.

Preface: With the development of the economy, motor vehicles have also become the main means of transportation for people. Therefore, the owner of the car knows the relevant common sense, in case the vehicle breaks down, can make relevant remedial measures in time.

If there is an abnormal noise on the rear axle of a motor vehicle, what is the cause of it? And what kind of maintenance methods do you need to take? Let's explain the origin for you.

1. The reason for the abnormal sound of the rear axle is the lack of oil in the gears, or the reduction of the viscosity between the gears, which may lead to the abnormal sound of the rear axle of the car. At the same time, excessive wear of the gears, or damage to the gears of the car, may also cause abnormal noise on the rear axle of the car. At the same time, the abnormal sound of the rear axle of the car may also be caused by the failure of the gear of the final reducer, or the improper tightness of the support shaft of the car.

When the car is bent by external force, the half shaft or the casing of the half shaft is bent, and the friction between the two will also cause the car to make abnormal noise. <>

Second, the performance of abnormal noise on the rear axle of motor vehicles, when the driver is driving a motor vehicle to start, or when changing gears, there is a sound of the machine, or when the speed is stable, it is caused continuously, etc., which are the phenomena of abnormal noise on the rear axle of motor vehicles. And if the rear of the vehicle shakes when driving a motor vehicle through a curve, it will also cause abnormal noise on the rear axle of the motor vehicle. When the driver steps on the acceleration version in the process of driving a motor vehicle, if the relevant parts of the final reducer appear intentional, and accompanied by heating.

In this case, there will also be abnormal noise on the rear axle of motor vehicles. <>

Third, the way to solve the abnormal sound of the rear axle of the motor vehicle is to turn over the business sound, if it is because of Pengzhou.

Cog, Cao Yu.

Half shaft spline. If the gap between the teeth is too large, you can ask the auto repair department to adjust the gap between the two, or replace the relevant components, and immediately solve the problem of abnormal noise on the rear axle of the car. If there is an abnormal warping sound, it is due to a decrease in the oil viscosity of the gear, or if there is a shortage of oil, you can change the oil to adjust.

If it is a problem with the half shaft and half shaft sleeve, you need to go to a professional auto repair shop and ask a professional person to repair it.

Hello, happy to answer your questions.

Questions. What happens when there is an abnormal sound on the rear axle of a light truck.

The sound of decorating the goods is particularly loud.

Hello, according to your inquiry, there is an abnormal sound on the rear axle of the truck, and the reasons for this fault phenomenon are as follows: Brake abnormal noise caused by brake pad wear. Abnormal noise from tire bearings.

Abnormal noise coming from inside the differential. An unusual noise coming from the rear of the vehicle. It is recommended to check whether there is a loose outside, such as the body frame, if there is no loose, then you need to cancel the vehicle to carry out a positioning inspection, check whether the tire bearing is abnormal or whether there is an abnormality inside the differential, if you are the owner himself, it is recommended that you go to the dealer or repair shop for further inspection.

Hope mine is helpful to you.

Hello, you need to lift the vehicle tires to check.

Questions. The sound of the empty car is very small, and it can be heard if the speed is too fast.

The more you pull, the louder it gets.

Visually checked, no problem.

Hello, then it's time to check the tire bearings and differentials.