What should you do if you notice very square and sharp edges on the lands of a spool valve from the valve body?

When assessing very square and sharp edges on the lands of a spool valve, the most appropriate action is to smooth the edges with crocus cloth to restore a slight chamfer. Sharp edges can lead to excessive wear on both the spool valve and the valve body. When these edges are too sharp, they might not allow for smooth operation, which can result in sticking or erratic performance of the transmission.

Using crocus cloth to gently smooth these edges helps to create a slight chamfer, which can reduce the risk of wear and improve the functional performance of the valve. This maintains the integrity of the valve assembly and ensures better transmission fluid flow within the system.

Taking no action might seem acceptable, but this condition is not desirable as it can lead to premature wear or failure of the transmission. Similarly, simply replacing the spool valve could be more costly and unnecessary if the existing valve can be rehabilitated through proper maintenance. Chamfering the edges with a sharpening stone could be too aggressive and might remove too much material, potentially altering the valve's fit and function.

Thus, smoothing the edges with crocus cloth strikes a balance between addressing the potential issues caused by sharp edges and preserving the component's functionality.