Description:Part # 8K-3289 provides an input coupling for the final drive. Final drives transfer power from the engine to the ground. Cat final drive components are designed to withstand the forces of high torque and impact loads, and to work as a system to deliver smooth, reliable operation. The final drive is the last component in the power train, producing the final speed reduction and torque increase.Attributes:• Steel input coupling with 14 drive teeth• External Spline Number of Teeth: 30• Internal Spline Number of Teeth: 13• Outside Diameter: 63.5 (2.50 in)• Length: 79.25 mm (3.120 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.