What Causes Stiff Gear Shifting in Manual Transmission?

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Incomplete engagement and disengagement of the clutch can lead to rough gear shifting in manual transmissions, and may even cause gear grinding. The second possible scenario is: wear of the transmission synchronizer. In either case, it is advisable to take the vehicle to a professional repair shop for inspection to determine whether the issue lies with the clutch or the transmission synchronizer. Below are relevant details: 1. Specific causes: Wear of the shift linkage, poor performance of the shift fork shaft, insufficient clutch travel leading to incomplete disengagement, excessively high viscosity of transmission oil, excessive wear of the synchronizer, etc. Excessive clearance or reduced lubrication in the connection between the gear lever and the transmission can result in inaccurate gear selection, leading to difficult gear engagement, which is a common issue with rough shifting. 2. Solution: Adjust the gear shift position at a specialized repair shop and replace the transmission oil to resolve the issue. For manual transmissions, when shifting at low speeds, the clutch must be able to disengage completely to smoothly engage the corresponding gear.