What causes the jerking sensation when starting a Corolla in cold conditions?

[MacLukas]

It is normal for a Corolla to experience jerking when starting in cold conditions. This happens because when you want to accelerate quickly while driving, you need to press the throttle deeply. At this point, the automatic transmission will automatically downshift to increase the engine speed. Once the speed reaches a certain level, it will upshift again. After upshifting, the speed will drop noticeably, resulting in a relatively pronounced jerking sensation. Below is some relevant information about automatic transmissions: 1. Gear Distribution: Generally, automatic transmission cars have six gear positions, arranged from top to bottom as: P, R, N, D, S, L. 2. Automatic Principle: The engine's power is transmitted through the gearbox, which is also a key factor affecting fuel consumption. Generally, automatic transmissions consume 10% more fuel than manual transmissions. Whether manual or automatic, the more gears a transmission has, the more fuel-efficient it is.