Why does the car body shake when shifting gears in an automatic transmission?

[DeCarter]

There are mainly two reasons for the car body shaking when shifting gears in an automatic transmission. They are: First: The transmission gear oil is relatively viscous and dense. Second: The transmission part receives the power from the engine more noticeably. Here are some additional explanations: Some automatic transmission cars may feel heavy when shifting from P to R gear when starting, sometimes accompanied by noise and shaking. This is relatively common and generally does not require much attention. This is a design issue, possibly caused by quickly shifting from D gear directly to P gear when parking, then turning off the engine. At this time, the internal parts of the transmission are not fully reset, leading to the above phenomenon when starting the car next time. Try shifting from D gear to N gear when parking next time, then pause and release the brake to let the car come to a complete stop before shifting to P gear. Check if there is any improvement the next time you start the car.