it is knowncarThe three major parts-engine, gearbox and chassis, each is very important. Once there is a problem, it will be overhauled or scrapped. Therefore, we all pay attention to the protection of these three items, but there are many novice drivers and friends who will always inadvertently cause a little damage to the car when driving. Today I will share with you some knowledge about the use of car gearboxes for maintenance. .
Replacement of transmission oil
Many car owners know that after the car has driven a certain number of kilometers, the oil is changed to avoid unnecessary damage to the engine.But many people will ignore the monitoring and replacement of transmission oil, because they don’t even know how often the transmission oil needs to be changed. ManuallytransmissionThe structure of the automatic transmission is different, and the frequency of changing the transmission oil is also different, but regardless of the manual transmission or automatic transmission model, problems will occur if the transmission oil is not changed for a long time, because the transmission oil is prone to occur under the long-term working high temperature environment The qualitative change, volatile.
If the gearbox oil is not changed for a long time, it will appear weak to start when the car is cold, and it may also slip slightly when driving. The gearbox oil will become very thick and easy to high temperature after using for a long time. Therefore, you must pay attention to the replacement of the transmission oil in the daily use of the car. Generally speaking, the replacement cycle of the transmission oil is calculated in the same way as the maintenance cycle of the vehicle. The mileage or use time shall prevail. These two indicators are clearly given in the, and they will be implemented first; if there is no such indicator in the vehicle user manual or the oil change time is not clearly marked, the replacement is generally based on the mileage of 50,000-80,000 kilometers.
Low gear and high speed
Many novice drivers will encounter the situation of directly lowering the gearbox gear from high to low during high-speed driving, especially for models with manual transmission. This operation is extremely harmful to the gearbox. After cutting into the low gear, The gearbox has to withstand huge torque and impact, and the possibility of damaging internal parts is extremely high. Even automatic models have low gears. The computer control program of the automatic gearbox has a memory function, which can switch to low gears directly during high-speed driving, destroying the original logic of the gearbox and accelerating gear wear.
Long-term parking for automatic transmission in D gear
I believe that many automatic transmission owners will be entangled in one thing, that is, when parking and waiting for the traffic light, whether to put on the D block and step on it.brake, Or use the handbrake with N gear, I think that as long as there is a short pause, there is no problem with these two methods. But if you park for a long time and hang in the D gear, there will be a problem. Not to mention the feet that step on the brake pedal will feel tired, it will also increase the transmission oil temperature, the transmission oil will easily deteriorate, and it will also affect the transmission. Heat dissipation.
Automatic transmission car N gear coasting
The manual gear model will not save fuel when coasting in neutral gear, because now it is controlled by ECU computer and electronic fuel injection mode. Although this has no fuel saving effect, it will not cause any damage to the manual gearbox. However, it is not so simple if you change to an automatic gearbox. When driving at high speed or downhill, shift the shift lever to the N gear and slide, it is very likely to burn the gearbox.Because the gearbox output shaftRotating speedHigh, while the engine is idling, the gearbox oil pump is insufficiently supplied, the lubrication condition deteriorates, and the multiple pieces inside the gearboxclutchIn other words, although the power has been cut off, its passive plate is driven by the wheels to run at a high speed, which is likely to cause resonance and slippage, which will cause undesirable consequences.
Reverse gear when the vehicle does not stop completely
When the vehicle is still moving forward, put the gearbox into R gear, which will damage the gearbox very much.Because doing so will produce an instant "reverse rotation pressure" to push to reverse gearClutch plate, For a long time to do so, the scrapping in the gearbox is not far away.
Start the engine in a gear other than P gear or N gear
Many models now have automatic start-stop function. Although this high-tech configuration is convenient and fuel-efficient, it also brings some problems, such as automatic flameout. After the flameout, the owner does not pay attention to the vehicle's gear in P or N gears. Start the engine when it is above the gear position. If you do this, you won’t see anything on the surface, but it may burn the gearbox and start in neutral.switch. Because the automatic gearbox is equipped with a neutral start switch, the gearbox can only start the engine in the P or N gear, so as to avoid starting the car by mistake in other gears, which will immediately start and move forward.
The front wheel is off the ground when towing
There will always be times when the car is unable to move. At this time, a trailer is needed to help. However, when towing, you also need to pay attention to the protection of the gearbox. Do not let the front wheel of the vehicle off the ground, especially for rear-wheel drive models. Because when the vehicle is towed, the oil pump of the gearbox stops working, and the parts lack lubrication. When the driving wheel is dragged, it will drive the gearbox, causing the gearbox to be damaged due to increased temperature.
As a daily transportation tool, cars provide us with a lot of convenience and save a lot of time. A well-maintained car will also save us a lot of trouble. Therefore, we should master correct and effective driving habits when driving a car, so as not to cause unnecessary damage to the car, and it will also waste our precious time.
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