T142438 Pinion, 10T Winch w/ 19.56:1 Ratio Deep Red. Fits John Deere 450G LT & LOne New Aftermarket Replacement Final Reduction Pinion Fits John Deere 4000 Series Winch This 10 tooth (10T) final reduction pinion is a direct replacement for the Fits John Deere (Fits JD) 4000 Series winch with a 19. 56: 1 gear ratio. The final reduction pinion transfers torque to the final drive assembly within the winch gearcase, and is a critical wear component in hydraulic dozer winch systems. The "Deep Red" designation in the part title