Originally Posted by thangcu35

The reason why its grinding is because the fluid is still too thick when its cold. Synchronizer's job is to grab the gears to match the output/input shaft speed and thick fluid delays the time it can do so. holding down the clutch pedal longer does nothing to help the issue, but slowing down the motion of the shift knob will help because it gives the synchronizer more time to match the speed before you jam it into gears. Thinner fluid will improve synchronizer speed in cold climate also.