The John Deere AR39128 Coupling Plate Hi-Lo is an authentic OEM component designed for various John Deere agricultural and utility tractor models. This crucial part facilitates the engagement and disengagement of the hi-lo transmission, ensuring smooth and efficient power transfer within the drivetrain. Manufactured to John Deere's rigorous specifications, it guarantees durability and precise fitment, maintaining optimal machine performance and longevity. This coupling plate is essential for the proper functioning of the transmission system.