The phenomenon of gear misalignment is the most common fault in manual transmissions. The gear misalignment in low flat manual transmissions refers to the situation where the clutch is in normal technical condition.

Common Faults
The phenomenon of gear shifting confusion is the most common fault in manual transmissions. In low flatbed manual transmissions, gear shifting confusion refers to the situation where, under normal clutch conditions, the transmission engages two gears simultaneously or engages a different gear when trying to select the required gear. The causes of this fault are rare, so correspondingly, the methods for troubleshooting and resolving it are also fewer. First, failure of the interlock device: such as excessive wear of the shift fork shaft, interlock pin, or interlock ball. Second, excessive wear of the curved working surface at the lower end of the gear lever or excessive wear of the groove on the shift fork shaft.
Thirdly, a broken positioning pin of the gear lever ball head or excessive wear of the ball hole and ball head causing looseness can also lead to gear jumping in low flatbed manual transmissions. In summary, the main cause of gear shifting confusion is the failure of the transmission control mechanism. With the above three points analyzed, we will proceed to diagnose and eliminate them one by one.
(1) When trying to engage the required gear but ending up in a different gear: shake the gear lever and check its swing angle. If it exceeds the normal range, the fault is caused by looseness in the fit between the positioning pin at the lower end of the gear lever and the positioning groove, or excessive wear of the ball head and ball hole.
If the gear lever of the flatbed manual transmission swings 360 degrees, it indicates that the positioning pin is broken.
(2) If the swing angle is normal but the gear cannot be engaged or disengaged, the fault is caused by the lower end of the gear lever coming out of the groove (the reason for this is wear of the lower curved working surface or wear of the guide groove).
(3) Engaging two gears simultaneously: the fault is caused by failure of the interlock device. Difficulty in engaging gears refers to a situation where the clutch condition is good, but the gear cannot be smoothly engaged, often accompanied by gear clashing sounds. A fault in the synchronizer is one of the causes of this issue.