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How Often Should Transmission Oil Seals Be Replaced?

2 Answers
OMaddox
08/29/25 4:04am
Transmission oil seals generally need to be replaced about once a year. Here are the hazards of not replacing transmission oil for a long time: 1. Hazard one: It can cause abnormal wear of the transmission and severe deterioration of the oil. 2. Hazard two: It can lead to aging and degradation of the transmission oil, not only increasing vehicle fuel consumption but also shortening the service life of the transmission. 3. Hazard three: It can cause the oil in the transmission to become granular, blocking oil passages and damaging the valve body, which directly affects system oil pressure and power transmission, resulting in delayed response and gear shift impacts in the transmission.
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MaximusLynn
09/10/25 8:41am
With years of experience in the maintenance field, my understanding of transmission oil seals is: they don't have a fixed replacement interval—it all depends on your driving habits and vehicle condition. If you frequently drive on bumpy roads or your vehicle is older, the seals may wear out faster. I've seen many car owners' vehicles where the transmission oil is typically checked every 50,000 to 70,000 kilometers, and the oil seals are inspected for any leaks at the same time. Neglecting this can lead to transmission overheating or even complete failure, costing at least several thousand yuan to repair. I recommend developing a regular maintenance habit, such as asking the mechanic to quickly check the undercarriage for oil stains during oil changes. Safety always comes first—failing oil seals can affect shifting smoothness and increase the risk of accidents on the road. Daily habits like avoiding heavy towing and sudden acceleration can help extend their lifespan.
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What causes abnormal noise when braking in reverse but normal when moving forward?

Abnormal noise when braking in reverse but normal operation when moving forward may be due to the following reasons: 1. The brake pads have metal hard spots, as there are some small metal particles inside the brake pads, which can cause abnormal noise when lightly braking. In this case, you can stomp on the brakes a few times or remove the brake pads for re-grinding, or replace them with better quality brake pads. 2. The brake pads are severely worn and begin to sound an alarm. Brake pads usually have warning indicators. When the brake pads wear to their limit, the warning indicators will rub against the brake disc, producing sharp metal friction sounds. At this point, it is essential to replace the brake pads promptly to avoid scratching the brake disc and brake failure.
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What does a circle with an A and OFF mean on a car?

The A with a circle and OFF on a car stands for AUTO, which means automatic; OFF means off, so together it means the vehicle's auto start-stop function is turned off. Below is some relevant information about the auto start-stop function: 1. The use of the auto start-stop system has certain conditions. It cannot be used when the battery is low, the temperature is too high or too low, the wheels are turning when stopping, the slope is too steep, or the seat belt is not fastened. 2. After turning on the auto start-stop function, simply press the brake pedal while driving. The engine will automatically shut off after the vehicle comes to a complete stop for about two seconds. Keeping the brake pedal pressed will keep the engine in the off state.
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Why is the air conditioning in the Mondeo not cooling?

The reasons why the air conditioning in the Mondeo is not cooling are as follows: 1. Lack of refrigerant or overcharging of refrigerant. 2. Presence of refrigerant, but the compressor is not working. Generally, the compressor may not work when the external temperature is too low. The compressor not working could be due to wiring issues, damage to the air conditioning pressure switch, or damage to the electromagnetic clutch. 3. A dirty condenser with poor heat dissipation can also affect the cooling performance of the air conditioning. Methods for cleaning the car air conditioning are as follows: 1. Replace the dust filter. Routine air conditioning system cleaning includes replacing the filter, using cleaning agents, and disassembling for cleaning. Replacing the dust filter is the simplest method, which is cost-effective and keeps the air intake unobstructed. Car owners with basic mechanical knowledge can do this themselves. In most small cars, the dust filter is located under the front windshield, covered by the rain gutter. To replace the dust filter, lift the engine hood, remove the clips securing the rain gutter, take off the rain gutter, and the dust filter will be visible. 2. Disinfect the external circulation air ducts. There are many cleaning agents on the market for cleaning air conditioning ducts, which car owners can purchase themselves. Remove the dust filter, start the vehicle, turn on the air conditioning, and set it to external circulation mode. Spray the foam cleaning agent onto the dust filter area, and the external circulation air will draw the cleaning agent into the ducts, disinfecting the ducts, air conditioning evaporator, and heater core, removing odors. The dirt will turn into liquid and flow out from the air conditioning drain. 3. Send it to a repair station for cleaning. Replacing the dust filter and using cleaning agents to clean the ducts are external cleaning methods for the air conditioning system. If the airflow from the vents is still weak or the odor is not completely removed after cleaning, you will need to take it to a repair shop to remove the air box, replace the evaporator, and manually clean the air conditioning heating device housing. 4. Use ozone disinfection. Utilize high-concentration ozone water for disinfecting the car air conditioning. It is understood that ozone water is currently one of the strongest oxidants available, capable of easily oxidizing and denaturing the protein shells of bacteria and fungi, rapidly killing bacterial propagules and spores, and oxidizing and decomposing E. coli, Staphylococcus aureus, hepatitis viruses, and cold viruses.
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How to Install the Seat Covers for Roewe i5?

Roewe i5 seat cushion installation method is as follows: 1. First, unzip the seat cover and slip it over the top of the car seat. 2. Connect the flower-shaped disc to the elastic rope of the car seat cushion, then tuck it into the gap between the backrest and the seat. 3. Then pull out the flower-shaped disc and secure it between the seat backrest and the seat, which serves as a fixing mechanism. 4. Place the rope cover over the seat platform and hook the front hooks onto the chassis, completing the installation of the entire seat cover. Precautions regarding car seat covers are as follows: 1. Be careful during installation and removal. Avoid pulling too hard on the Velcro, elastic bands, or ropes used for sewing and installation to prevent affecting their use. 2. When the seat gets dirty, gently wipe it with a damp towel (be careful not to use excessive force). 3. Parts of the car interior that are exposed to direct sunlight for long periods (such as the upper part of the backrest) may experience discoloration. 4. Not suitable for seats with built-in side airbags. 5. Generally, fabric car seat covers should be replaced every 2 years or so.
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What Causes the Exhaust Pipe to Make a Popping Sound?

The specific reasons for the exhaust pipe making a popping sound are as follows: 1. The exhaust valve is burnt or has poor sealing, causing severe air leakage. 2. There is carbon buildup at the contact surface between the intake and exhaust valves and the seat ring. 3. There is no clearance in the valve stem. 4. The two idle jets of a dual-barrel carburetor are unevenly adjusted or clogged. Below is more information about the car's exhaust pipe: 1. Water dripping from the exhaust pipe can, to some extent, indicate that the car's engine is in good working condition and that the gasoline is burning relatively completely. However, it is not the case that the more water drips from the exhaust pipe, the better. Excessive water can damage the oxygen sensor in the car's three-way catalytic converter, which in turn affects the regulation of fuel injection and reduces the vehicle's power performance. 2. The car's exhaust pipe can reduce vibration and noise, extending the service life of the exhaust muffler system.
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How to Turn on the Heater in an Audi A3?

Here are the steps to turn on the heater in an Audi A3: 1. Start the vehicle and wait for the entire system to power on. 2. Semi-automatic mode: Do not turn on the AC switch, adjust the temperature control to the warm setting. When the car is running, turning on the fan will produce warm air. For automatic climate control, simply adjust the temperature. 3. Manual air conditioning: Press the AC switch, select the cooling mode, and choose the desired airflow direction. Additional Information: 1. The A/C switch is the air conditioning switch, which essentially controls whether the compressor is working. Inside the compressor, there is an electromagnetically controlled clutch. When the coil is energized, the electromagnetic clutch engages, and the compressor operates. Otherwise, the compressor's pulley spins freely without the compressor working. 2. When the air conditioning switch is pressed, you will hear a click, which is the sound of the compressor's electromagnetic clutch engaging. Air circulation modes: Controls whether the blower draws air from inside or outside the vehicle. In cooling mode, the internal circulation mode is generally used, meaning the blower draws air from inside the vehicle. Temperature adjustment: Air is cooled by passing through the evaporator of the cooling system and heated by passing through the heater core. The proportion of air flowing through the heater core is controlled to adjust the temperature and humidity inside the vehicle. Airflow mode adjustment: Controls where the air is directed—toward the upper part, the dashboard, the footwell, or a combination of these.
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