REMOVAL & INSTALLATION
See Figures 1 through 7
- Raise the vehicle and support it safely with jackstands.
- Place a suitable drain pan under the transfer case and driveshaft to catch any fluid that may drip out.
Mark the driveshaft and flanges so they can be reassembled in their original position.
- Remove the bolts securing the driveshaft to the rear axle flange.
Don not allow the driveshaft to hang free. Support the driveshaft during removal.
- Slide the driveshaft out from the transfer case until it clears the extension housing. Plug the extension housing hole to prevent fluid leakage.
- Apply a light coating of grease to the splines of the driveshaft.
- Slide the driveshaft into the transfer case.
- Position and connect the driveshaft to the front axle using the retainer bolts. Tighten the bolts to 65-87 ft. lbs. (88-119 Nm).
- Lower the vehicle. Check the transfer case fluid level and add if needed.
- Remove the driveshaft from the vehicle and place on a clean surface.
- Mark the position of the U-joint components in relation to the driveshaft. To maintain proper driveshaft balance, these components must be install in the same location.
- Clamp U-joint tool T74P-4635-C or equivalent into a vise.
- Remove the snaprings from the U-joint bearing caps.
- Position the slip yoke of the U-joint in the clamp tool and press out the bearing.
- Remove the slip yoke from the clamp tool, then rotate it 180° and position in the vise. Press the bearing to remove the spider. Remove the yoke from the spider.
- Remove the remaining bearing in the same manner.
Universal joint kits are to be installed as a complete kit. Never mix components from other U-joints
- Start a new bearing cup into the yoke of the driveshaft.
- Position the spider in the driveshaft yoke and press the bearing 1 / 4 in. (6.3mm) below the yoke surface using the clamp.
- Remove the driveshaft from the clamp, and install a snapring over the new bearing.
- Start a new bearing cup in the opposite yoke. Place the assembly in the clamp and press the bearing in place. When complete, install another snapring over this bearing to lock in place.
- Install the remaining bearing in the same manner. Make sure to install a snapring after each bearing has been pressed in place.
- Before installing the driveshaft into the vehicle, make sure the U-joint rotates in all directions easily. If the joint binds, use a plastic-faced hammer and tap on the driveshaft yoke-side of the joint to seat the bearing.
- If the driveshaft is equipped with a grease fitting, apply a premium long life grease to the joint assembly.
- Install the driveshaft into the vehicle. Refer to the procedure in this section.
See Figures 8, 9 and 10
If after servicing one or more driveshafts, the vehicle vibrates or shakes, the driveshaft(s) may have to be removed and balanced.
Before taking the time to balance the driveshaft, remove it from the vehicle, rotate it 180° and reinstall it. In some cases this may solve the problem. In the event it does not, then the driveshaft must be balanced.
To balance the driveshaft, proceed as follows:
- Raise both the front and rear of the vehicle and support safely with jackstands. Make sure that all the wheels are off the ground and can rotate freely.
- Remove the wheels and tires. If equipped with drum brakes, install the lug nuts to hold the drums in place.
- Start the vehicle and place in gear. Bring the engine speed up until the shaking or vibration begins. Record this speed.
- Locate the heavy side of the rear of the driveshaft and scribe a mark on that side.
- Install two screw-type hose clamps on the rear of the driveshaft with the screw head 180° from the heavy side (scribe mark) of the driveshaft.
- Run the vehicle again up to the speed at which the vibration began. If the vibration is still present, rotate the clamps an additional 45° from their original position.
- Run the vehicle up to the speed at which the vibration began. If the vibration is still present, rotate the clamps again, in small increments.
- With the installation of the clamps, the vibration level should decrease. In the event the vibration is not totally eliminated, locate the heavy side of the front of the driveshaft and use two clamps there to reduce the vibration.
- When the vibration is totally eliminated, install the wheels and tires, then lower the vehicle.