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What Causes Slow Shifting in Automatic Transmissions?

1 Answers

McMadeline

07/30/25 4:04am

Automatic transmission slow shifting is caused by: contaminants inside the transmission, high transmission temperature leading to deteriorated transmission fluid, resulting in lubrication and temperature control issues. The working principle of automatic transmissions consists of a torque converter, planetary gears, hydraulic torque variation system, and hydraulic control system, achieving gear ratio changes through hydraulic power transmission and gear combinations. Below is relevant information about automatic transmission torque converters: 1. Torque converter: The most distinctive component of AT transmissions, composed of impeller, turbine, and stator, directly receiving engine power and transmitting torque while serving a clutch function. 2. Impeller and turbine: When using fluid instead of air as the energy transfer medium, the impeller drives the turbine through fluid, with the stator creating rotational speed differences between impeller and turbine to achieve torque multiplication.

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