REMOVAL & INSTALLATION
Ball and Trunnion Type
- Raise the vehicle and support it on jackstands.
- Matchmark the U-joint and pinion flange to ensure proper installation. Remove both rear U-joint roller and bearing assembly clamps from the pinion yoke. Do not disturb the retaining clamp used to hold the roller assemblies in place.
- Disconnect the front U-joint from the transmission flange and remove the shaft from the vehicle.
- Installation is the reverse of removal.
- Raise and support the vehicle. Matchmark the U-joints and sliding yokes.
- Remove the U-joint at the rear axle by removing the two strap bolts and straps.
- Remove the two bushing and roller assemblies.
- Remove the front U-joint in the same manner by removing the strap bolts and straps.
- Remove the driveshaft from the vehicle.
- Installation is the reverse of removal. Coat the bushing rollers with short fiber grease and tap the bushings into the yoke on the cross bearing journals.
- Raise and support the truck.
- Matchmark the shaft and pinion flange to assure proper balance at installation.
- Remove both rear U-joint roller and bushing clamps from the rear axle pinion flange. Do not disturb the retaining strap that holds the bushing assemblies on the U-Joint cross.
Do not allow the driveshaft to hang during removal. Suspend it from the frame with a piece of wire. Before removing the driveshaft, lower the front end to prevent loss of fluid.
- Slide the driveshaft from the truck.
- Installation is the reverse of removal. Align the matchmarks made during removal.
This driveshaft has a universal joint at either end, with a third universal joint and a support bearing at the center.
- Matchmark the shaft and the rear axle pinion hub yoke. Matchmark the center bearing spline and slip yoke.
Do not allow the driveshaft to hang down during removal. Suspend it from the frame. Raise the rear of the truck to prevent loss of transmission fluid.
- Remove both rear U-joint roller and bushing assembly clamps from the rear axle pinion yoke. Do not disturb the retaining strap used to hold the bushing assemblies on the U-joint cross.
- Slide the rear half of the shaft off the front shaft splines at the center bearing. Remove the rear half.
- At the transmission end of the front half, remove the bushing retaining bolts and clamps, after matchmarking. If there is a driveshaft brake, there will be flange nuts.
- Unbolt the center bearing mounting nuts and bolts and remove the front half of the shaft.
- On installation, align the matchmarks at the transmission and start all the bolts and nuts at the front U-joint and the center support bearing.
- Tighten 1 / 4 " clamp bolts to 170 in. lbs. and 5 / 16 " bolts to 300 in. lbs. Tighten driveshaft brake flange nuts to 35 ft. lbs. Leave the center bearing bolts just snug.
- Align the rear shaft matchmarks and slide the yoke onto the front shaft splines.
- Align the rear U-joint matchmarks and install the bushing clamps and bolts. Tighten the bolts to the torque given in step 7. Grease the joints and splines.
- Jack up the rear wheels and let the engine drive the shaft. The center support bearing will align itself.
- Tighten the center bearing bolts to 50 ft. lbs.
Ball and Trunnion Type
- Remove the driveshaft.
- Straighten the tabs on the grease cover and remove the grease cover and gasket.
- Push the body back and remove the components from both ends of the trunnion pin.
- Remove the clamps and loosen the dust cover. Remove and save the breather located between the driveshaft and rear end of the cover.
- Clean and examine the trunnion pin for wear. If wear in the body is noticeable, it should be replaced. A press is necessary to remove the pin.
- Clean all parts in kerosene or a similar solvent.
- When the trunnion pin and body have not been replaced, a new boot can be installed after coating all parts with U-joint grease. Stretch the boot over the pin and work it through the body into position on the shaft.
- The trunnion pin must be pressed into the driveshaft with a hydraulic press.
- Install a thrust washer, rollers, ball, button spring, and thrust button on each end of the trunnion pin and position the body over the pin.
- Install the boot on the driveshaft with the breather parallel to the shaft. Install the clamp.
- Position the boot on the U-joint body and install the retaining clamp.
- Lubricate the U-joint with 2 oz. of U-joint grease applied evenly in both races.
- Install the gasket on the cover and install the cover on the body. Bend the tabs to retain the cover.
- Install the driveshaft and U-joint assembly.
See Figure 1
- Hammer the bushings (roller caps) slightly inward to relieve pressure on the retainers. Remove the retainers.
- Place the yoke in a vice with a socket bigger than the bushing on one side and one smaller than the bushing on the other side.
- Apply pressure, forcing one bushing out into the larger socket.
- Reverse the vise and socket arrangement to remove the other bushing and the cross.
- On installation, press the new bushings in just far enough to install the retainers.
See Figure 2
Unbolt strap bolts and remove straps, bushings, seals and washer retainers. Install new components as required. When assembling, grease bearings. Install with grease fitting parallel to other fittings in drive train. Tighten strap bolts to 20 ft. lbs. torque.Slip Joints
When re-assembling slip joints, make sure that arrows stamped on each side are matched. This will assure proper universal joint alignment.