This genuine Case IH part 74000328456 is a critical pinion component designed for various Case IH JX series utility tractors, including models such as JX100U, JX1070U, JX1080U, JX1090U, JX1100U, JX70U, JX80U, and JX90U. It ensures precise and reliable power transmission within the machinery's drivetrain. Manufactured to OEM specifications, this pinion provides optimal performance and durability for demanding agricultural applications, maintaining the integrity and efficiency of your Case IH equipment.