When driving an automatic transmission car uphill, you can use the S (Sport) or L (Low) gear, or simply the D (Drive) gear. For manual transmission cars, the gear selection depends on the slope and engine power: use fourth gear for small slopes if it provides enough power, third gear for moderate slopes (switch to second gear if third is insufficient, either before or during the climb, while coordinating the clutch and throttle). For steep slopes, use second gear if possible, and switch to first gear if second gear lacks power. The choice of gear should be based on the engine RPM and the steepness of the slope. Climbing requires higher torque, so the transmission should be kept in a lower gear to increase wheel torque. When driving, you often encounter uphill sections where the car needs greater wheel torque, necessitating the use of lower gears. For particularly steep slopes, first or second gear may be appropriate. Using first or second gear provides substantial wheel torque, aiding in a smooth climb. However, for front-wheel-drive cars on slippery slopes, first gear can easily cause wheel spin. Front-wheel-drive cars already experience reduced traction on uphill slopes, and slippery conditions worsen this. If the wheel torque is too high, the front wheels may lose grip and spin. In such cases, reducing the torque by shifting to second or third gear can help. During a climb, avoid shifting gears whenever possible, as gear changes cause a temporary loss of power, which may lead to insufficient momentum and rolling backward.
