What does D2 mean in an automatic transmission?

[DelCarlos]

D2 in an automatic transmission means second gear lock, where the vehicle only drives in second gear without automatically shifting up. The D1, D2, and D3 in an automatic transmission are all gear limiters, which lock the vehicle in a fixed forward gear without shifting up or down, preventing the transmission from jumping to a higher gear. You can switch between D1, D2, and D3 while driving, but be aware that when shifting from a high-speed gear to a low-speed gear, the vehicle will experience noticeable engine braking, and the brake lights will not illuminate during this deceleration, which may cause misjudgment by following vehicles. D1 in an automatic transmission is similar to gears 1 and 2 in a manual transmission, with the highest gear ratio and strongest torque output, making it suitable for steep climbs or towing other vehicles. D2 is similar to gears 3 and 4 in a manual transmission, with a reduced gear ratio and torque output, also suitable for climbing or towing. D3 is similar to gears 5 and 6 in a manual transmission, offering balanced torque and power output, and can be directly engaged while driving to downshift for higher torque output when overtaking.