Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
you don't have to do all this, but this is for all the u-jonts they make for your truck. good luck please accept if satisfied. thanks T-MAN
See Figures 1, 2, 3, 4, 5, 6, 7 and 8
There are three types of U-joints used in these trucks. The first is held together by wire snaprings in the yokes. The second type is held together with injection molded plastic retainer rings. This type cannot be reassembled with the same parts, once disassembled. However, repair kits are available. The third type (4-wheel drive models only) is the large constant velocity joint which looks like a double U-joint, located at the transfer case end of the front driveshaft.
The bearing cap cannot be driven completely out.
To remove the bearing support:
Assemble the bearing support as follows:
Assemble the trunnion bearings:
Molded Retainer Type
An injection molded plastic retainer is used on some models. A service repair kit is available for overhaul.
Never clamp the driveshaft tubing in a vise.
Fig. 1: U-joint alignment, 1980-87 K models with two-piece driveshafts only Fig. 2: U-joint alignment keyway, 32 spline shaft Fig. 3: U-joint repair kit, snapring types Fig. 4: U-joint bearing cup removal with a vise, snapring type Fig. 5: Install trunnion into bearing yoke Fig. 6: Install U-joint snaprings Fig. 7: Tap the tube yoke lightly to seat the U-joint bearings against the lock rings Fig. 8: Injected molded retainer U-joint repair kitConstant Velocity (CV) Joint
See Figures 9, 10 and 11
Fig. 9: Constant velocity joint showing alignment marks punched for reassembly Fig. 10: Constant velocity joint disassembly sequence Fig. 11: Exploded view of a constant velocity joint
4-WHEEL DRIVE MODELS ONLY
It is easier to remove the universal joint bearings from the flange yoke first. The first pair of flange yoke universal joint bearings to be removed is the pair in the link yoke.
In the absence of a press, a heavy vise may be used, but make sure that the universal to be removed is at a right angle to the jaws of the vise. Do not cock the bearing cups in their bores.
There is a ball joint located between the two universals. The ball portion of this joint is on the inner end of the flange yoke. The ball, as well as the ball seat parts, are replaceable. Care must be taken not to damage the ball. The ball portion of this joint is on the driveshaft. To remove the seat, pry the seal out with a screwdriver.
The flange yoke should snap over center to the right or left and up or down by the pressure of the ball seat spring.