Common sense of automatic transmission car maintenance

Automatic transmission cars are favored by many consumers because of the convenience of shifting. How to maintain automatic transmission cars? Let’s take a look at the common sense of automatic transmission car maintenance.

1. Ignition coil


Many people know that the spark plug needs to be replaced regularly, but they neglect the maintenance of other parts of the ignition system, and the ignition high-voltage coil is one of them. When the engine is running, there are often tens of thousands of volts of high-voltage pulse current on the ignition coil. Because it works in a high temperature, dusty and vibrating environment for a long time, it will inevitably be aged or even damaged.
2. Exhaust pipe

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The car’s exhaust pipe is rusted, corroded, and holed, causing dry noise to increase and power loss. The main reason is that it is not maintained. If the muffler is discolored in the exhaust pipe, and the exhaust pipe enters the water when driving on a deep water road, and then the engine is turned off, then this kind of damage is fatal to the car. Therefore, the exhaust pipe is one of the most easily damaged parts under the car. Don’t forget to take a look at it when overhauling, especially the exhaust pipe with three-way catalytic converter, which should be checked carefully. It is recommended that the new car be maintained once after it is registered, and it is usually maintained once every six months.
3. Ball cage cover


The car ball cage is divided into inner ball cage and outer ball cage, also known as “constant velocity joint”. The main function of the ball cage is to prevent dust from entering the ball cage and prevent the loss of lubricant in the ball cage. After damage, it will cause dry grinding, and in severe cases, the half shaft will be scrapped, so routine inspections must be done.
4. Carbon canister



It is a device that collects gasoline vapor and reuses it. It is located between the pipeline of the gasoline tank and the engine. Its installation position on each car is different, either on the frame or in front of the engine. near the hood. Generally, there are only three pipes on the fuel tank. The pipe that supplies fuel to the engine and the return pipe are related to the engine, and the carbon canister can be found along the remaining pipe.
5. Generator bearings


Many repairmen are now dubbed “stevedores”, which means that they only change parts and do not repair. In fact, as long as some components are maintained according to regulations, their life can be greatly extended, and the generator is one of them. Generally speaking, when the vehicle travels 60,000-80,000 kilometers, the generator should be overhauled. In addition, the bearings of the water pump, power steering pump, and air conditioner compressor should also be checked regularly.

6. Spark plug


The types of spark plugs can be divided into ordinary copper core, yttrium gold, platinum, iridium, platinum-iridium alloy spark plugs, etc. Different types of spark plugs have different service lives, ranging from 30,000 to 100,000 kilometers. The spark plug is related to the excellent performance of the car, and it can even save gasoline for the car, so the maintenance of the spark plug is very necessary, and the carbon deposition and clearance of the spark plug should be checked regularly.
7. Steering rod


When parking, if the steering wheel does not return to the correct position, the wheel will pull the steering rod and cannot be returned, and the gear of the steering wheel and the rack of the steering rod are also under stress, which will cause these parts to accelerate aging or deformation over time. During maintenance, be sure to check this part carefully. The method is very simple: hold the tie rod and shake it vigorously. If there is no shaking, it means that everything is normal. Otherwise, the ball head or tie rod assembly should be replaced.
8. Brake disc


Compared with brake shoes, brake discs are rarely mentioned by car owners in their maintenance routines. Actually, both are important. Most car owners have been staring at when to replace the brake shoes, but they don’t pay attention to the deterioration of the brake disc. Over time, it will directly affect the braking safety. Especially when the brake shoes are replaced two to three times, they should be replaced. After all, if the brake disc wears too much, its thickness will become very thin, which will affect the normal driving at any time.
9. Shock absorber


Oil leaks are a sign of damage to the shock absorbers, as are significantly increased bumps on bad roads or longer braking distances.
The above introduces the relevant content of the common sense of automatic transmission car maintenance. Let’s take a look at the misunderstandings of automatic transmission car maintenance.

Myth 1: Not confirming the shift before starting the engine

Some drivers start the engine in gears other than P or N, although the engine cannot run (because of the protection of the interlock mechanism, it can only be started in P and N), but it is possible to burn out the neutral start switch of the transmission. Because the automatic transmission has a neutral start switch. The transmission can only start the engine in the P or N gear, so as to prevent the car from starting to move forward immediately when other gears are started by mistake. Therefore, be sure to confirm whether the shift lever is in the P or N gear before starting the engine.

Misunderstanding 2: Still in D gear when parking for a long time

When a vehicle equipped with an automatic transmission is stuck in a traffic jam, some car owners often only step on the brake pedal, but the shift lever is kept in the D gear (driving gear) and does not shift gears. This is permissible if the time is short. However, if the parking time is long, it is best to switch to N gear (neutral gear) and apply the parking brake. Because when the shift lever is in the D gear, the automatic transmission car generally has a slight forward movement. If you press the brake pedal for a long time, it is equivalent to forcibly stopping this forward movement, which makes the transmission oil temperature rise and the oil is easy to deteriorate, especially in When the air conditioning system is working, it is more disadvantageous when the engine idle speed is high.

Myth 3: Increase the accelerator to shift to high gear

Some drivers think that as long as the D gear starts, they can shift to a high-speed gear by increasing the accelerator all the time, but they do not know that this approach is wrong. Because the shift operation should be “receive the accelerator to upshift in advance, step on the accelerator to downshift in advance”. That is, after starting in D gear, keep the throttle opening at 5%, accelerate to 40km/h, release the accelerator quickly, it can be raised to a gear, and then accelerate to 75km/h, release the accelerator and raise a gear. When lowering, press the driving speed, step on the accelerator a little, and return to the low gear. But it must be noted that the accelerator cannot be stepped on to the bottom. Otherwise, a low gear will be forcibly engaged, possibly causing damage to the transmission.

Misunderstanding 4: Skiing in N gear when driving at high speed or downhill

In order to save fuel, some drivers slide the shift lever to N (neutral) when driving at high speed or downhill, which is likely to burn out the transmission. Because the speed of the output shaft of the transmission is very high at this time, and the engine is running at idle speed, the oil supply of the transmission oil pump is insufficient, the lubrication condition is deteriorated, and for the multi-disc clutch inside the transmission, although the power has been cut off, its passive plate is driven by the wheels at a high speed. Running, it is easy to cause resonance and slippage, resulting in adverse consequences. When you really need to coast down a long slope, you can keep the shift lever in the D block to coast, but do not turn off the engine.

Myth 5: Pushing the cart to start the engine

Cars equipped with automatic transmissions and three-way catalytic converters cannot be started due to lack of battery power, and it is very wrong to start by pushing people or other vehicles. Because, using the above method is not able to transmit power to the engine, but will damage the three-way catalytic converter.

Post time: Mar-08-2022