What Causes Severe Shaking When Shifting Gears in an Automatic Transmission?

1 Answers
OMariana
07/30/25 2:24am
Severe shaking of the vehicle body when shifting gears in an automatic transmission is due to the gear oil in the transmission being too viscous and dense, causing the drivetrain to receive the engine's power more noticeably, thus resulting in a noticeable shake of the car. This situation requires prompt attention. Possible reasons for the gear oil becoming viscous: The gear oil may have been contaminated with various impurities and metal shavings inside the gearbox during operation; some of the light oil components in the gear oil may have naturally evaporated during use; or the properties of the gear oil may have changed due to deterioration after its expiration date. Corresponding solutions: If the issue is contamination with impurities, timely cleaning is sufficient; if it's due to the natural evaporation of light oil, timely addition of light oil is needed; if the gear oil has expired, it should be replaced promptly. Key points for shifting gears in an automatic transmission: When shifting between gears other than D and S, first press the brake, then move the gear lever to the desired gear, and finally release the brake to complete the gear shift.
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