What are the hazards of starting the car in gear?

[StRuby]

Starting the car in gear can damage the starter motor and parking brake, and also cause wear and tear on the car's mechanical components. Below are specific tips for shifting gears in a car: 1. Shift gears according to the car's speed. Generally, start in first gear, then shift to second gear after driving a few meters. Shift to third gear when the speed reaches above 20 mph but below 35 mph; shift to fourth gear when the speed reaches above 35 mph but below 45 mph; and shift to fifth gear when the speed exceeds 45 mph. This applies to standard five-speed transmission cars. For cars with six or more gears, you can shift up one gear approximately every 15 mph increase in speed. Additionally, pay attention to the engine RPM—shift promptly when it reaches around 2500 RPM. 2. If the vehicle starts to shake, it indicates the engine is operating at low speed with high load. Immediately downshift by one or two gears based on the situation. 3. Coordinate the clutch and throttle when shifting. Fully depress the clutch, then release the throttle pedal, and quickly shift to the desired gear. After shifting, immediately remove your hand from the gear lever to avoid prolonged contact, which can damage the lever. 4. Master the correct hand position for shifting. Many drivers overlook this. The proper hand position involves placing your palm downward over the gear knob, gripping it firmly with all five fingers, and then shifting. 5. Shift gears completely. Ensure the clutch is fully depressed when shifting. To engage first gear, push left and then forward; for second gear, push left and then downward; for third gear, push straight upward from neutral; for fourth gear, push straight downward from neutral; and for fifth gear, push straight right and then upward.

[MacVivienne]

That time when I was learning to drive, the instructor specifically emphasized that you must shift into neutral before starting the car. Starting the car in gear can cause it to suddenly lurch forward or backward, which is particularly dangerous. For example, when parked on a slope or in a narrow lane, it could easily hit pedestrians, walls, or other vehicles, posing a significant risk of accidents. The instant torque when starting the vehicle is very high, and forcing it against the transmission gears can cause wear. Long-term use in this manner can damage components such as the clutch disc or flywheel. Once, I forgot to check, and the car started in first gear, nearly rolling back into a tree. Later, it cost quite a bit to repair. Developing good starting habits is crucial: press the clutch and shift into neutral before ignition—this protects the car and ensures safety. For automatic transmission cars, also pay attention to ensuring the gear is in park before starting.

[HoldenLee]

As someone who has driven manual transmissions for years, I know that starting the car in gear can significantly impact the mechanics. If the gear isn't in neutral when starting, the engine's ignition shock is directly transmitted to the drivetrain, accelerating wear on the transmission gears. The clutch assembly bears excessive force, making it prone to deformation or cracking. A single oversight might not cause immediate harm, but repeated occurrences can shorten component lifespan, eventually requiring major replacements like clutch plates or synchronizers. The repair costs are high, and it also compromises driving safety. Develop the habit when parking: engage the handbrake and shift to neutral. Standardize the starting procedure—press the clutch, shift to neutral, then ignite—to prevent unintended movement. In cold weather when the battery is weaker, avoid adding extra load to ensure smooth vehicle operation.

[Will]

The main hazard of starting the engine while in gear is sudden uncontrolled vehicle movement. When the engine starts with the transmission engaged, the car may lurch forward or backward, potentially causing collisions. Additionally, excessive stress on transmission components like gears can lead to damage. Manual transmission operation errors are common; the solution is to always verify the gear lever is in neutral before ignition. Developing the habit of applying the handbrake and shifting to neutral when parked prevents dangers. Depressing the clutch during startup enhances safety. These simple steps can avoid troubles.