The Case IH 135990A1 is a genuine OEM ball bearing designed for various Case IH, New Holland, and Steyr agricultural tractors equipped with Power Shift transmissions. This critical component ensures smooth operation and durability within the transmission system. With an inner diameter of 40mm, an outer diameter of 80mm, and a width of 18mm, this high-quality bearing provides reliable performance for demanding agricultural applications, specifically within the CX 4000 Power Shift system and other compatible models.