Description:Part # 111-8209 provides a spider for the differential that transmits power and compensates for difference in speeds between wheels on either side of the machine and provides for positive traction through use of a locking device.Part of the final drive system, the differential and bevel gear group transmits power from the drive shaft to the axle shafts through bevel gear reduction and differential. Final drives transfer power from the engine to the ground. Attributes:• Trunnion Diameter: 38.049 mm (1.498 in) (4X)• Center Hole Diameter: 78 mm (3.071 in)• Outside Diameter: 152.4 mm (6.00 in)• Width: 38.05 mm (1.498 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.