
The speed corresponding to C1 gear is as follows: 1. First gear: corresponding speed is 10-20km/h. 2. Second gear: corresponding speed is 20-30km/h. 3. Third gear: corresponding speed is 30-40km/h. 4. Fourth gear: corresponding speed is 40-50km/h. 5. Fifth gear: corresponding speed is above 60km/h. Additional information: Precautions during the test: If the clutch pedal is not fully depressed when shifting gears, the system will not detect the gear shift signal and will assume the vehicle is still in the current gear, leading to speed mismatch and point deduction. To avoid incomplete or untimely gear shifting, master the key points of gear shifting: timely, correct, smooth, and quick. Shift gears promptly, depress the clutch correctly, engage gears smoothly, and complete the entire shifting process swiftly and neatly.

After years of driving, I've come to understand that the C1 gear in a car's transmission typically refers to the low-speed first gear in manual or automatic transmissions, with a speed range generally between 0 to 20 kilometers per hour, mainly used for starting or slow uphill climbs. I remember when I was younger driving a manual transmission car, I would always gently shift into first gear at traffic lights, keeping the engine below 2000 RPM for a smooth acceleration into second gear. If I accidentally shifted into the wrong gear at high speeds, such as exceeding 40 kilometers per hour, the engine would roar loudly, causing wear and tear on components like the crankshaft and gears. In city driving, using first gear properly can protect the engine's lifespan. Nowadays, I particularly rely on it when starting on slopes or towing heavy loads to avoid prolonged high RPM operation. Different car models have slight variations; the speed limit for first gear in sedans and SUVs differs, so it's best to consult the manual.

As a car mechanic, the C1 gear corresponds to a speed range of 0 to 20 kilometers per hour, which is based on the engine's protective design mechanism. The manual transmission's first gear allows for gradual acceleration when starting, preventing the engine RPM from exceeding safe limits; similarly, switching an automatic transmission to first gear mode has a comparable effect, but prolonged operation at excessive speeds may cause the clutch and transmission system to overheat. I've handled numerous cases where customers mistakenly used first gear as a high-speed gear, leading to elevated transmission fluid temperatures and gear wear, resulting in costly repairs. Engine RPM is a critical indicator—generally, first gear is most suitable between 1500 to 2500 RPM, and exceeding this range may damage components. Regular transmission fluid checks are recommended to maintain performance.

Safety first is my driving principle, and the speed in C1 gear must be kept below 20 km/h. On steep slopes or icy roads, using first gear to accelerate slowly can prevent skidding and avoid accidents. I remember one snowy day when I mistakenly engaged first gear on the highway, causing the engine RPM to soar to 3000, nearly losing control—a profound lesson. Exceeding the speed limit increases the risk of accidents. Now, I only use it when necessary, such as in crowded streets, and quickly shift to second gear to accelerate.


