Is It Illegal to Convert a Manual Transmission to an Automatic One?

2 Answers
AnnieLee
07/25/25 6:07am
Legally speaking, converting a manual transmission to an automatic one is not illegal, but modifications should be done cautiously as they may affect the annual vehicle inspection. A manual transmission can be converted to a pseudo-automatic transmission: By installing an electronic control system to assist the driver in operating the clutch, but gear shifting still requires manual operation. When shifting gears, the system controls a motor to automatically depress the clutch, releasing it once the gear is engaged, preventing stalling. The system also provides prompts when shifting is needed. Disadvantages of modification: The modified vehicle may fail the annual inspection, and arbitrary modifications can also impact insurance claims. Accidents caused by modified parts may not be covered by insurance.
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VanStephen
08/10/25 6:03pm
I've been repairing cars for nearly twenty years, and converting a manual transmission to an automatic one is something that really requires caution. Firstly, traffic regulations clearly prohibit unauthorized modifications to a vehicle's powertrain, and transmission conversion is a typical illegal modification. Last year, I worked on a modified Lavida where the owner spent 23,000 yuan to switch to an automatic transmission, only for the transmission to overheat and seize on the highway, nearly causing an accident. Later, the vehicle inspection station rejected it during the annual check, and the insurance claim was denied. If you really want to make the change, you must file it with the vehicle management office and pass a safety technical inspection to make it legal, but the whole process is time-consuming and costly. The key issue is that the original drivetrain system has to be dismantled and modified, leading to an extremely high failure rate afterward. It's really not as cost-effective as simply switching to an automatic transmission model.
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