Each axle shaft has two constant velocity joints: inner and outer. The outer hinge features a double cage design with balls to allow angular movement (see illustration). The inner hinge has three pins with rollers that allow angular movement and allow the axle shaft to move in and out.
The constant velocity joints are protected by rubber boots which are held in place by clamps to keep water and dirt out of the joints. Protective covers should be checked periodically (see chapter 1, section 13). Damaged covers must be replaced immediately, otherwise the hinges may be damaged. When replacing the protective covers, remove the axle shafts (see section 2). Each time the boot is replaced, it is also recommended to disassemble, clean, inspect, and overhaul the constant velocity joint and ensure that it is not contaminated with moisture or dirt, which could cause premature failure of the joint.
The most common symptom of wear or damage to constant velocity joints, other than grease leaks, is a popping or clicking noise when turning, a dull metallic sound when accelerating, or vibration when driving.
Note: If your vehicle is equipped with the Delco Loc II audio system, be sure to disable the system lock before performing any operation that involves disconnecting the battery.
1.2. Two types of constant velocity joints used on each axle shaft: A - inner constant velocity joint, B - outer constant velocity joint