Proper installation procedures have not been followed. The snap-in mechanism of the release bearing has not been clipped on firmly.
When the transmission is installed onto the mating area of the engine the release bearing is preliminarily set into position where the release fork of the transmission is fitted.
After installation of the transmission the release lever must be pulled in the direction reverse to the release firmly. The bearing is then snapped in. (Also refer manufacturer's specifications).
Clutch Disc