The WP9709231 is a genuine Whirlpool worm gear engineered for KitchenAid stand mixers. This critical drivetrain component transfers power from the motor to the mixing bowl, ensuring smooth and consistent operation. Over time, worm gears wear from regular use, causing grinding noises, slipping, or reduced mixing power. Replacing a worn gear restores full performance and prevents further damage to the mixer's transmission. Compatible with most KitchenAid stand mixer models. Install with confidence using this OEM part.