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What is the reason why the car cannot move forward or backward after starting?

1 Answers

VanLillian

07/30/25 9:09am

When a car cannot move forward or backward after starting, it is usually due to a malfunction in the transmission or drivetrain system. In such a situation, it is advisable to immediately visit a 4S shop to check the fault codes. The transmission is a crucial component of the drivetrain system, as it enables gear shifting and torque conversion, allowing the power output from the car's engine to meet the demands of various driving conditions. More details about the transmission are as follows: 1. It is divided into manual transmissions and automatic transmissions: There are two types of transmissions in cars, one is the manual transmission, and the other is the automatic transmission. 2. Classification of automatic transmissions: There are three common types of automatic transmissions in cars: AT transmissions, CVT transmissions, and dual-clutch transmissions. (1) The AT transmission is the most mature and widely used automatic transmission. It contains numerous planetary gears inside, which are responsible for gear shifting and torque conversion. The AT transmission is connected to the engine via a torque converter. (2) The CVT transmission is a relatively simple automatic transmission in structure, consisting of only two pulleys and a steel belt. (3) The dual-clutch transmission is a product developed based on the manual transmission, with the addition of an extra clutch and a gear-shift control mechanism. One clutch in the dual-clutch transmission controls the odd-numbered gears, while the other controls the even-numbered gears. The dual-clutch transmission offers fast gear shifting and relatively high transmission efficiency.

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