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What are the reasons for difficulty in engaging 1st and 2nd gears after changing transmission fluid?

2 Answers
AaronRose
09/05/25 6:21am
The reasons for difficulty in engaging 1st and 2nd gears after changing transmission fluid are: 1. Insufficient clutch release travel, resulting in incomplete clutch disengagement; 2. Excessive self-locking force of the clutch gear; 3. Deformation of the clutch pressure plate assembly's drive plate due to certain reasons, causing poor disengagement; 4. In colder temperatures, the viscosity of the transmission fluid does not reach the optimal state. Transmission fluid is an oil product that keeps the gear system clean, lubricates to extend the life of the transmission device, and provides effective lubrication even at low temperatures, reducing oil loss under harsh operating conditions. Depending on the transmission structure, transmission fluid is divided into automatic transmission fluid and manual transmission fluid.
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DelKyle
09/17/25 6:41am
I once encountered a situation where after helping a friend change the transmission oil, it became difficult to shift into 1st and 2nd gears. The possible reasons could be overfilling the new oil, which increases the oil pressure and causes the clutch to operate improperly, or the oil viscosity being too high and not matching the transmission. If air enters the system during the operation, it can interfere with the hydraulic function. The process might have overlooked residual old oil, which when mixed, affects lubrication. My suggestion is to drive a few kilometers first to let the system adapt and see if it improves. If there's no change, it's necessary to check whether the oil level meets the standard and if the oil type is correct. Prolonged issues like this can easily damage the synchronizer, so it's important to return to a professional shop for repairs as soon as possible to avoid increasing safety risks. Transmission maintenance is a meticulous job and should not be taken lightly.
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