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Should You Shift to Neutral at a Red Light in an Automatic Transmission Car?

1 Answers

VonMatthew

07/29/25 10:43pm

Whether to shift to neutral at a red light in an automatic transmission car depends on whether the power transmission device may overheat and fail. Details are as follows: 1. Theoretically, for automatic transmissions with a radiator, if the red light wait time does not exceed 30 seconds: shifting to neutral is unnecessary. 2. If exceeding 30 seconds: it is recommended to shift to neutral. 3. For automatic transmissions without a radiator: shifting to neutral is advised. 4. For vehicles equipped with auto start-stop: simply keeping the brake pedal pressed is sufficient. Relevant information about automatic transmissions is as follows: 1. Classification: There are various types of automatic transmissions, including AT, CVT, DCT, and DSG. 2. AT and CVT: AT and CVT transmissions are grouped together as they both use a torque converter as the power transmission device, relying on circulating hydraulic fluid to transfer power. The heat generated by the torque converter is dissipated by the hydraulic fluid to the transmission radiator, preventing the fluid from losing performance due to overheating. These devices are equipped with radiators. 3. DCT and DSG: DCT and DSG are called dual-clutch automatic transmissions, with the power transmission device further divided into wet and dry dual clutches. Wet dual clutches also have radiators, while dry dual clutches lack radiators, with heat dissipation efficiency equivalent to a manual transmission clutch. Overheating can burn the clutch plates.

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