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What causes the clunking impact when shifting into reverse in an automatic transmission?

1 Answers

IsabellaFitz

07/29/25 1:00pm

Automatic transmission shifting into reverse with a clunking impact is caused by: 1. Electronic linkage between the brake system and the automatic transmission: When shifting gears, the clutch pedal is not fully depressed, causing gear damage; 2. Idle shifting: The automatic transmission model shifts into reverse before the engine speed drops to a stable state, causing a strong impact on the transmission; 3. Reverse gear lacks a synchronizer: The synchronizer is an internal device of the transmission that ensures smooth gear engagement when shifting while driving. Automatic transmissions do not require the driver to manually shift gears; the vehicle automatically selects the appropriate gear based on driving speed and traffic conditions.

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