What are the reasons why a manual transmission car suddenly cannot shift gears?

1 Answers
Zoey
07/29/25 1:42pm
Reasons why a manual transmission car suddenly cannot shift gears: 1. Failure of the P-gear lock solenoid valve. This solenoid valve requires a signal from the brake pedal to release, so these two components are interconnected. If either component fails, it will prevent the gear lever from being pushed out of P-gear into other gears; 2. Internal failure of the gear lever assembly, causing the gear lever to get stuck. Difficulty in moving it back and forth leads to the inability to shift gears or difficulty in shifting; 3. Incomplete clutch disengagement, caused by failure of the clutch disc or clutch pressure plate. This requires replacement of the clutch three-piece set (friction disc, pressure plate, and release bearing); 4. Presence of debris in the transmission oil affecting the gear shifting of manual transmission cars.
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