The drive block (WP389140) connects the inner wash tub to the transmission in your washer. If you notice your washer's basket spinning freely or creating loud noises during operation, it may be time to replace the drive block. This part is compatible with large capacity belt drive and direct drive washers. A genuine Whirlpool replacement, it ensures a secure connection between the spin basket and basket drive. Before purchasing, verify your washer's model number for compatibility.