What Causes the Jerking Sensation When Shifting to P Gear in an Automatic Transmission?
1 Answers
If you want to accelerate quickly while driving, you need to press the accelerator pedal deeply. At this point, the automatic transmission will automatically downshift to increase the engine speed. When the speed reaches a certain level, it will upshift again. After upshifting, the engine speed will drop significantly, resulting in a relatively noticeable jerking sensation. This situation often occurs in automatic transmission models with fewer gears, such as 4-speed automatic models. After starting an automatic transmission vehicle, if you want to drive smoothly, you can lightly press the accelerator pedal at the appropriate time, and the transmission will automatically upshift, resulting in a weaker shifting jerk. If you want to maintain better acceleration performance, you need to press the accelerator pedal deeply. The automatic transmission will upshift to a higher gear at a higher speed, resulting in a more noticeable shifting jerk. The following situations require maintenance and adjustment: 1. Some automatic transmissions have self-learning capabilities. During the break-in period, if the owner is hesitant to press the accelerator pedal aggressively, leading to gentler shifts, the transmission will shift at lower speeds. When the shifting speed drops to a certain level, such as shifting from second to third gear at just over 1000 rpm, the engine may experience insufficient torque, commonly known as lugging. Therefore, proper accelerator operation is crucial for improving shift timing, saving fuel, and reducing jerking sensations. 2. Excessive carbon buildup in the throttle body, fuel injectors, or intake ducts requires timely cleaning. 3. Issues with the torque converter assembly. 4. The transmission control module data needs updating, etc.
