This rear axle shaft bushing acts as a wear interface between the axle shaft and the axle housing. It supports the rotating shaft and maintains alignment under load. The bushing is pressed into the rear portion of the axle housing; the shaft rotates within it, and any clearance beyond specification allows the shaft to deflect, leading to seal leakage and accelerated gear wear. This component is manufactured by AGCO to match the original housing bore and shaft journal tolerances, so no reaming or shimming is required during installation. On replacement, inspect the shaft journal for scoring and ensure the bushing is fully seated before reassembling the hub.