Download ISSUE Some 2002-2005 Explorer 4dr/Mountaineer and 2003-2005 Aviator vehicles may exhibit a noise from the rear wheel hub bearings. Previous service procedures required service replacement of the wheel hub bearing assembly, base part (1109). This new service procedure allows replacement at a lower service level of the wheel bearing, base part (1215) to repair the noise condition. ACTION Replace the rear hub bearing and wheel bearing retainer ring. Refer to the following Service Procedure. SERVICE PROCEDURE NOTE HAVE AN ASSISTANT PRESS THE BRAKE PEDAL TO KEEP THE AXLE FROM TURNING. 1. Remove the axle-to-wheel hub retainer nut and washer (Figure 1). Discard the nut. When reinstalling at end of procedure, tighten to 203 lb-ft (275 N•m).Figure 1 – Article 05-25-8 2. Remove the bolt and disconnect the wheel speed sensor (Figure 2). To install, tighten to 71 lb-in (8 N•m).