Why Can't the Transmission Gear Be Engaged?

[DeWalker]

There are several reasons why the transmission gear cannot be engaged: 1. The positioning component of the gear shift lever's ball head fails: The gear shift lever can rotate freely around its own axis, making it impossible to accurately control the gear position; it could also be due to wear on the spherical working surface at the lower end of the gear shift lever, preventing it from controlling the shift fork or the shift head's groove, making both gear engagement and disengagement impossible. 2. The clutch fails to fully disengage: while the transmission's shift mechanism operates normally. This issue can be resolved by adjusting the clutch or replacing certain clutch components to ensure proper free play and separation clearance. 3. Pressure plate malfunction: Many vehicles experience heavy clutch pedals or difficulty shifting when hot, often caused by prolonged wear of the pressure plate or aging of the release fingers. Replacing the pressure plate is necessary, which is relatively complex as it requires removing the entire transmission for replacement.