Will an automatic transmission car roll back on a slope?
2 Answers
If an automatic transmission car is in neutral gear, it will roll forward or backward as long as the handbrake is not engaged or the brake pedal is not pressed. Reasons for rolling back on a slope: 1. Not pressing the brake, inertia: The driver does not press the brake or engage the handbrake, causing the vehicle to roll back due to inertia. 2. Insufficient power: In neutral gear, the power is insufficient, or the vehicle's idle power is limited, and the slope is steep. When in D gear, the vehicle's power is insufficient, leading to rolling back. 3. Delayed power response: Some automatic transmission models experience a delay in power delivery when releasing the brake and pressing the accelerator, causing the vehicle to roll back.
Automatic transmission vehicles typically prevent rolling back when climbing hills, as modern designs feature torque converters or hill-start assist systems that lock the drive wheels. Having driven automatic cars for many years, I've found that issues rarely occur unless on steep slopes or with aged transmissions. When stopping on an incline with the foot brake applied, the system automatically maintains power output for a few seconds to keep the wheels stationary. However, on slippery surfaces or with older vehicles, slight rolling of a few centimeters may occur. It's advisable to firmly press the brake pedal in advance when starting, release the handbrake, and then gently press the accelerator for smooth acceleration. Regular checks of transmission fluid and maintenance of the braking system are also crucial to prevent accidental rolling and potential accidents. Overall, automatic transmissions are much safer than manual ones, and beginners need not worry excessively.