I have ford fiesta. Car was in good condition. All of a sudden, I started facing a weird issue which my mechanic also facing tough time identifying the real problem. My car is running fine from the first start in the morning. I am able to change the gears smoothly. After 15mins of driving gear shifting slowly gets tight and after half an hour, I have to put more pressure to change the gears. After I stop the car and let the car cool down, the gear shifting getting back to normal and this cycle repeats. I don't see any problems with the clutch as it is recently changed.
Gear oil is good. Clutch is engaging and disengaging fine. No grinding noise observed while disengaging clutch and while shifting gears.
This is happening with all the gears. Did anyone face this kind of issue or anyone knows the fix?