What is the speed range for 4th gear?

[SanCharles]

4th gear corresponds to a speed range of 40-60 kilometers per hour. When driving a manual transmission car, the gear should match the engine speed and driving speed. 1st gear has a speed range of around 10 km/h; 2nd gear ranges around 20 km/h; 3rd gear covers 20-40 km/h; while 5th gear operates at approximately 60 km/h. Most car engines have an optimal economical RPM range, and when driving manual transmission vehicles, it's advisable to maintain the engine speed within this economical range. Manual transmission refers to a manual gearbox where the driver manually shifts gears by operating the gear lever to change the gear engagement mechanism inside the transmission, thereby altering the gear ratio to achieve speed variation. The working principle involves using shift forks to change the transmission ratio of meshing gears, consequently modifying the driving torque to adapt to different road conditions.

[OSilas]

I've been driving for over 20 years, and the speed range for 4th gear isn't fixed at all—it really depends on your car's condition and the road situation. From my experience, in compact cars, 4th gear usually operates smoothly between 40 to 70 km/h, like when accelerating on city roads. For larger SUVs or sports cars, it might push up to 60 to 100 km/h or more, especially during highway cruising. Engine power and vehicle weight have the biggest impact—smaller engines tend to vibrate more easily, so keeping them between 2,500 to 3,500 RPM is most fuel-efficient. Once, I drove an old Focus uphill in 4th gear at 50 km/h, and it ran smoothly, whereas a newer model could handle up to 80 km/h. Transmission condition is also crucial—if it's worn, speeds become unstable, and acceleration feels sluggish. Remember, using 4th gear properly improves fuel efficiency, but don't exceed speed limits on highways. Regularly check transmission fluid and the clutch to ensure safe and smooth driving.

[ODante]

I love playing with cars. The 4th gear in a manual transmission car is the soul gear for acceleration, with a speed range roughly between 50 to 90 kilometers per hour, depending on the car model. My hot hatch can start accelerating fiercely from 50 to 70 km/h, making overtaking effortless, while my friend's big pickup truck cruises steadily between 60 to 100 km/h in 4th gear. In automatic transmission cars, the 4th gear engages earlier, with the computer adjusting the speed to match the engine load. Engine type and air resistance also matter—turbocharged engines have strong explosive power, but when climbing hills, be mindful not to let the RPM get too high to prevent overheating. In daily driving, using the 4th gear properly can avoid high fuel consumption and excessive engine noise. I recommend test-driving different cars to experience the differences, and don’t forget to maintain the transmission. Keeping tire pressure at the right level helps with more precise speed control. On highways, choose the right moment to shift gears, and don’t take risks to rush.

[EmilyMarie]

I just got my driver's license, and the speed for 4th gear varies from person to person. In the instructor's car, they said it's most suitable around 45 to 65 km/h, while regular sedans like the Civic can maintain a steady speed between 50 and 70 km/h. However, this entirely depends on the car's condition and road situation; speed may drop a bit on steep slopes. Why use 4th gear? It's more fuel-efficient and comfortable than 3rd gear, making commuting effortless. It's recommended for beginners to operate based on the tachometer, ideally within the 2000 to 3000 RPM range. If the speed fluctuates frequently, it might be a transmission issue—check the manual or consult a mechanic. Avoid sudden acceleration and practice starting slowly.