What is the minimum speed in fourth gear to avoid stalling?
2 Answers
The speed in fourth gear should not be below 40 mph or exceed 60 mph. The shifting method varies depending on the vehicle's engine. Below is an extended introduction: Example: The vehicle's speedometer has markings. Taking the Jetta as an example: shift from first gear to second gear at 20 mph, second gear to third gear at 30 mph, third gear to fourth gear at 40 mph, and fourth gear to fifth gear at 50 mph. Introduction to shifting: Shifting is the abbreviated term for the operation method of the gear lever. Mastering the operation (especially for manual transmission vehicles) directly affects driving safety. Generally, the operation method of the gear lever refers only to the gear lever itself, while shifting not only includes the operation method of the gear lever but, more importantly, encompasses all behavioral processes, including speed estimation, to achieve the goal (gear shifting).
The minimum non-stalling speed in fourth gear varies from person to person. Having driven manual transmissions for over a decade, I can say there's really no universal standard. Last week while cruising in my friend's 1.5L sedan in the city, the car started shaking like a sieve when fourth gear dropped to 25 km/h, so I quickly downshifted to third to stabilize it. But last month driving my cousin's 2.0T SUV, it could still climb steadily at 20 km/h in fourth gear. The key is watching the tachometer needle – anything below 800 RPM is basically stalling territory. Personally, I prefer keeping fourth gear RPM above 1,200, which translates to a speed range of 30-40 km/h. If you encounter a long downhill with braking, the engine gets dragged by the wheels and won't stall, but you need to be careful about brake overheating in such situations.
