What should the technician do about the disc splines during a clutch installation?

During a clutch installation, lightly lubricating the disc splines is a crucial step to ensure proper functioning of the clutch system. The splines are designed for the clutch disc to slide smoothly onto the input shaft of the transmission during engagement and disengagement. This lubrication reduces friction and wear between the components, which can lead to sticking or binding when the clutch pedal is operated.

If the splines are completely dry, it can result in a rough engagement or even difficulty in shifting, especially in situations where the splines may need to move slightly relative to each other. On the other hand, using high-pressure grease can lead to excess buildup that could attract dirt and debris, potentially causing operational issues later. Leaving the splines alone could lead to the same problems as having them dry, as there would be no lubrication to aid in smooth operation.

Thus, lightly lubricating the splines provides the right balance, ensuring the components can move freely without attracting excessive dirt or causing operational issues.