What's wrong with the car shaking in D and not shaking in N?

Put the D gear in the car and shake it.

N gear doesn't shake. Why?

Automatic cars need to stay in the right gear to drive, but some cars will shake when they are in D gear, but they will not shake when they are in N gear. So what is this phenomenon?

Transmission oil problem: if the automobile transmission oil is not changed in time, it will become sticky after being used for a period of time, and the lubrication effect will be greatly reduced, which will increase the internal resistance of the transmission, so the automobile will shake badly when parking in D gear.

Too much carbon deposit in the engine: it may be that the engine produces a large amount of carbon deposit, which leads to the blockage of the throttle and injector, so that the gasoline sprayed by the injector will be absorbed by a small amount, and the mixture is too thin, which leads to the car shaking and the difficulty in starting the car.

Mat aging: among the many gears of an automatic car, D gear is the forward gear and N gear is the neutral gear. If the D-block parking jitter is serious, it may be that the foot pad of the engine or gearbox is aging, which leads to poor buffering between the car body and the engine, and then the jitter is felt, especially when parking in D-block. It is urgent to replace the new machine pad, and all car owners can replace it in auto repair shops such as 4s shops.