What is the reason why the first gear of a manual transmission car cannot be engaged?
2 Answers
Manual transmission car cannot engage the first gear because the first gear teeth of the transmission are severely worn, and replacing a new gear teeth can solve the problem. Manual transmission, also known as manual gearbox, is a type of transmission device, the most basic type in automotive transmissions. Its function is to change the gear ratio, also known as the gear ratio, which uses the principle of leverage to amplify the engine torque with the large diameter gear of the low-speed gear with a longer radius, helping the vehicle to start moving forward. Manual transmission belongs to pure mechanical structure, so increasing the number of gears will inevitably increase the volume and mass, making the increase in gears limited. In contrast, automatic transmissions using planetary gear sets (AT) or steel belts (CVT) can compress the volume with technological advancements, thereby achieving the characteristic of increasing the number of gears without increasing the volume.
I've seen this issue quite often at the repair shop - manual transmission cars failing to engage first gear. The most common reason is incomplete clutch disengagement. When you depress the clutch pedal, if there's air in the hydraulic system or worn components, the power transmission isn't fully interrupted, making gear engagement difficult. Another frequent culprit is synchronizer problems - if the first gear synchronizer is worn or damaged, it feels like it's stuck when trying to shift. Old or insufficient transmission fluid can also be to blame, as poor lubrication makes shifting rough. Additionally, loose shift linkage cables or internal gear damage in the transmission may cause this. My advice: never force it to avoid further damage, especially when driving - pull over safely before retrying. Remember, regular clutch system maintenance is crucial - checking fluid levels and cable tension helps prevent such failures.
