Drive Axles, Bearings and Joints: Service Precautions

Before disassembling any universal joint, examine the assembly carefully and note the position of the grease fitting (if used). Also, be sure to mark the yokes with relation to the propeller shaft so they may be reassembled in the same relative position. Failure to observe these precautions may produce rough vehicle operation which results in rapid wear and failure of parts, and place an unbalanced load on transmission, engine and rear axle.
When universal joints are disassembled for lubrication or inspection, and the old parts are to be reinstalled, special care must be exercised to avoid damage to universal joint spider or cross and bearing cups.