What Causes the Jerking Sensation When Shifting to R Gear in an Automatic Car?

[CourtneyLynn]

Automatic car shifting to R gear has a jerking sensation due to a damaged solenoid valve causing the jerk. The reason for the jerk is that if there is sludge in the circulating transmission fluid blocking the oil passages in the valve body, it can lead to stumbling issues, resulting in a series of transmission problems such as high temperature, impact, and slippage. Other reasons for jerking sensations: 1. Upshift jerk: The transmission's response speed is not fast enough, and the upshift speed cannot keep up with the acceleration pedal's speed, so at the moment the transmission shifts, a jerking sensation occurs. 2. Downshift jerk: Due to the intervention of the energy recovery system, once the driver releases the accelerator pedal or presses the brake pedal, the generator immediately starts working, which burdens the engine, affecting the engine speed and causing it to be out of sync with the clutch plate speed, resulting in a jerking sensation.