What Causes an Automatic Transmission Car to Shudder When Starting?

1 Answers
Paul
07/29/25 11:39pm
Automatic transmission car shudder when starting can be caused by: 1. Insufficient fuel supply at low throttle due to clogged fuel lines; 2. Uneven engine operation caused by a blocked throttle body restricting air intake; 3. Unstable engine performance due to burnt high-voltage wires or spark plug breakdown; 4. Abnormal transmission operation. Solutions for automatic transmission car shudder when starting include: 1. Cleaning the throttle body, fuel injectors, and fuel lines; 2. Inspecting wiring or replacing spark plugs. An automatic transmission eliminates the need for manual gear shifting by the driver, as the vehicle automatically selects the appropriate gear based on driving speed and traffic conditions, utilizing planetary gear mechanisms for gear changes.
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