K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Fig. 4 Cross & Roller Type Universal Joints & Propeller Shaft
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.
Figs. 3 and 4 illustrate typical examples of universal joints of this type. They all operate on the same principle and similar service and replacement
procedures may be applied to all.
Fig. 5 Removing Bearing Cups From Yoke
Disassembly
1.
Place driveshaft into a vise using care not to damage it.
2.
Remove snap rings (or retainer plates) that retain bearing cups in yoke and driveshaft.
3.
Select a socket with an outside diameter slightly smaller than the bearing cup. Select another socket with an inside diameter slightly larger than the
bearing cup.
4.
Place the sockets at opposite ends of the yoke so that the smaller socket becomes a cup pusher and the larger socket becomes a cup receiver and
reposition in vise as shown Fig. 5. Close vise jaws until both cups are free of yoke. Remove cups from the cross or spider and remove yoke.
5.
If bearing cups will not come all the way out, close the vise until the cup in receiver socket protrudes from yoke as much as possible without using
excessive force. Then remove from vise and place that portion of the cup which protrudes from yoke between vise jaws. Tighten vise to hold cup
and drive yoke off with a soft hammer.
6.
To remove opposite bearing cup from yoke, replace in vise with pusher socket in exposed cross journal and receiver socket over bearing cup, then
tighten vise jaws to press cup through yoke into receiving socket. If bearing cup will not come all the way out, place protruding portion of
cup between vise jaws, then tighten vise to hold cup while driving yoke off cup with soft hammer.
7.
Turn spider or cross 1/4 turn and repeat procedure to press cups out of driveshaft.
