What are the corresponding speeds for manual mode in an automatic transmission?

2 Answers
Everdeen
07/24/25 3:04am
The corresponding speeds for manual mode in an automatic transmission are as follows: 1st and 2nd gears for 5-20 km/h; 3rd gear for 20-40 km/h; 4th gear for 40-60 km/h; and 5th gear for 60-100 km/h. Lack of acceleration power: If you notice abnormal engine shaking during acceleration, it is likely caused by degraded spark plug performance. Poor spark plug performance can significantly reduce the engine's ignition capability, leading to a lack of acceleration power. Idle shaking: If the car engine exhibits significant shaking during idle operation, it may also indicate a problem with the spark plugs, which should be checked or replaced promptly. Of course, it could also be due to aging engine mounts or excessive carbon buildup in the intake manifold. It is recommended to have it inspected at a professional repair shop. Difficulty starting: If the car engine is hard to start, this is an issue with the ignition system, possibly caused by faulty spark plugs. If the engine stalls without reason, it is likely due to more than two cylinders ceasing to function.
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KatherineLee
08/10/25 10:40pm
My experience with driving a semi-automatic car tells me that the speed range for each gear in manual mode depends on the specific car model and driving habits. Generally, first gear is suitable for speeds between 0 to 20 km/h to avoid engine lugging at low RPM or excessive fuel consumption at high RPM. The ideal shift point for second gear is usually between 20 to 40 km/h, where the engine runs smoothly. Third gear is recommended for speeds of 40 to 60 km/h, making highway cruising more effortless. Fourth gear and above are best for speeds over 60 km/h, such as relaxed cruising on highways. However, the key is to watch the tachometer—keeping RPM between 1500 to 2500 is safest. Drivers who have tried different cars know that shifting too early for convenience can make the engine protest. I often use manual mode in stop-and-go city traffic, finding the control more direct.
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