What is the reason for the Chery Karry K50 disengaging in fifth gear while driving?

[DeElle]

Chery K50 transmission disengaging in fifth gear, it is recommended to check the vehicle's transmission shift cable. Inadequate transmission calibration: If the fifth gear of the transmission is not properly calibrated, and the meshing position of the driving gear and driven gear is incorrect, it can cause severe deformation of the driving and driven gears. This changes the meshing angle of the gears, leading to separation of the driving and driven gears during vehicle acceleration! This results in the disengagement phenomenon. Poor quality of transmission components: If the materials used for transmission components and the quenching treatment quality are poor, and the quenching process for transmission shafts, driving gears, driven gears, and bearings does not meet standards, it can accelerate wear on the gears and bearings. Even if the quenching process for these components meets standards, substandard materials will not be durable.

[JuneLynn]

Recently, I've repaired quite a few Chery Karry K50s, and the fifth gear popping out is quite a headache. I reckon it's mainly due to the synchronizer aging – over time, it wears thin and can't grip the gear teeth properly, causing the gear to jump out while driving at high speeds. The shift fork is another issue; if it's bent or stuck, it won't hold the fifth gear securely. Gear wear shouldn't be ignored either – if the gear teeth tips are worn down, they're prone to disengaging. Driving habits also play a role; if the clutch isn't fully depressed when shifting, forcing it in a semi-engaged state will definitely cause the gear to pop out. Last time I worked on a car, even a loose shift lever assembly ball joint caused this problem. Delaying repairs could damage the entire gear set. If you encounter this issue, get the synchronizer clearance and shift fork linkage checked immediately – trying to save a little now might cost you big later.

[StCarlos]

I've been driving my K50 for three years, and last month, it suddenly popped out of fifth gear, which nearly gave me a cold sweat. After some research, I found several common issues: excessive wear on the synchronizer rings is the most frequent, causing the gear to not lock securely during shifting; the shifting mechanism can become loose and fail to hold its position; damage to the gear engagement surfaces can also cause gear jumping; unstable oil pressure or overly aggressive shifting can trigger it as well. Some fellow car owners in the group have even encountered cases where loose transmission mount screws caused overall displacement. When I took it to the 4S shop, they found a slight deformation in the shift fork, and after adjustment, it's temporarily fine. I recommend checking the transmission oil condition every 50,000 kilometers and making sure to fully depress the clutch when shifting. This issue can occur suddenly and is extremely dangerous on highways—don't wait for an accident to address it.

[DelRichard]

Fifth gear disengagement is generally caused by these mechanical failures: worn synchronizer cone rings leading to unstable gear engagement, deformed shift forks resulting in insufficient travel, and axial clearance due to gear pair wear. Deteriorated or insufficient oil may accelerate wear. The shift cable requires precise adjustment, as being too tight or too loose affects positioning. Driving habits also play a role, with frequent half-clutch operations exacerbating damage. A dial indicator is necessary to accurately measure shift fork clearance for precise diagnosis.