K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Universal Joint: Service and Repair
Double Cardan Type
Fig. 1 Production Type Universal Joints Which Use Nylon Injection Rings In Place Of Snap Rings
Fig. 2 Service Type Universal Joints (Internal Snap Ring Type)
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.
Some driveshafts use an injected nylon retainer to hold the bearing cups. When service is necessary, pressing the cups out will sheer the nylon retainer,
Fig. 1. Replacement with the conventional steel snap ring type is then necessary, Fig. 2.
Fig. 9 Double Cardan Universal Joint Exploded View
The double cardan type joint, Fig. 9, incorporates two universal joints, a centering socket yoke, and center yoke at one end of the shaft. A single
universal joint is used at the other end.
