What causes the transmission failure of not being able to shift gears?

[DiCourtney]

The reasons and solutions for transmission failure where gears cannot be engaged are as follows: Positioning component failure: It may be that the positioning component of the gear lever's ball head has lost its function, allowing the gear lever to rotate freely around its own axis, making it impossible to accurately control the gear position. This fault can be resolved through repair. Clutch not fully disengaging: It may be that the clutch cannot fully disengage, while the gear shifting mechanism of the transmission is working normally. This fault can be resolved by adjusting the clutch or replacing some clutch components to ensure the clutch has appropriate free play and disengagement clearance. Shift fork damage: It may be that the shift fork is loose, severely bent, deformed, or worn. In this case, the gear lever's movement is in place, but the shift fork's movement is not, causing severe impact and failure to engage gears. In such a situation, the transmission cover should be opened for inspection and repair, and the shift fork should be replaced if necessary.