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Why Does the Automatic Transmission Shake Severely When Shifting Gears?

1 Answers

OBethany

07/30/25 2:49am

Severe shaking of an automatic transmission car when shifting gears is due to the transmission gear oil being too viscous and dense, which makes the transmission components receive the engine's power more noticeably, causing the car to shake significantly. This situation requires timely attention. Possible reasons for the gear oil becoming viscous: During operation, the gear oil may become contaminated with various impurities and metal shavings from the gearbox; some of the light oil components in the gear oil may naturally evaporate during use; or the properties of the gear oil may change due to deterioration after its shelf life has expired. Corresponding solutions: If the issue is due to contamination, clean it promptly; if it's caused by the natural evaporation of light oil, add light oil in time; if it's due to the expiration of the shelf life, replace the gear oil promptly. Key points for shifting gears in an automatic transmission: When switching between gears other than D and S, first press the brake, then move the gear lever to the desired position, and finally release the brake to complete the gear shift.

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