The following symptoms may indicate a malfunction of the valve body: increased vibrations and grinding noise when changing gears or a complete shutdown of the engine that occurs periodically. The dismantling procedure involves draining the oil, removing the sump and filter, disconnecting the solenoid connectors and the sensors, and dismantling and disassembling the valve body. When repairing the valve body, it is often necessary to replace dirty valves with new ones. Plus, the procedure involves thorough cleaning of the valve body box, including the dirty valves, and removing the scratches on the plungers.