Notes: R113948-P.O.57201451 COUNTERPLATE Diff. locking SP. 1.5 is original JOHN-DEERE product. R113948-P.O.57201451 COUNTERPLATE Diff. locking SP. 1.51 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849