Which gear should be used for automatic transmission cars when climbing a slope?

[HaileyAnn]

Automatic transmission cars should use the L gear when climbing a slope. Some models do not have an L gear but have low-speed gears 1 and 2. Below are the working principle and usage scenarios of the L gear: Working principle of the L gear: The L gear refers to the low-gear mode of the transmission. In this mode, the transmission stays in 1st gear and does not shift up, reducing the transmission ratio, lowering the speed, and outputting greater torque. Usage scenarios of the L gear: Besides climbing slopes, the L gear is also needed for long downhill descents to utilize engine braking, preventing the driver from having to press the brake for extended periods, which could overheat the brake pads and lead to danger. Additionally, the L gear can be used on bad roads or muddy surfaces to increase output torque.