Notes: 1987816 - P/O 20033 THRUST SHOE 149.5X115X8 / RALLA is original CATERPILLAR product. 1987816 - P/O 20033 THRUST SHOE 149.5X115X8 / RALLA1 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849