Mustang Driveshaft and U-joint Service
DRIVESHAFT REMOVAL & INSTALLATION
- Mark the relationship of the rear driveshaft yoke to the drive pinion flange of the axle.
If the original yellow alignment marks are visible, there is no need for new marks. The
purpose of this marking is to replace the assembly in its original position, maintaining
proper balance. See Fig. 1
- Remove the bolts which hold the rear universal joint to the pinion flange. Wrap tape
around the loose bearing caps in order to prevent them from falling off the spider.
- Pull the driveshaft toward the rear until the slip yoke clears the transmission housing
and the seal. Plug the hole at the rear of the transmission housing or place a container
under the opening to catch any fluid which might leak.
- Carefully inspect the rubber seal on the output shaft and the seal in end of the
transmission extension housing. Replace them if they are damaged.
- Examine the lugs on the axle pinion flange and replace the flange if the lugs are shaved
- Coat the yoke spline with special-purpose lubricant. (The Ford part number for this
lubricant is B8A-19589-A.)
- Remove the plug inserted into the rear of the transmission housing.
- Insert the yoke into the transmission housing and onto the transmission output shaft. Use
care to make sure that the yoke assembly does not bottom on the output shaft with excessive
- Locate the marks made on the rear driveshaft yoke and the pinion flange prior to removal
of the driveshaft assembly. Install the driveshaft assembly with the marks properly
- Install the U-bolts and nuts that attach the universal joint to the pinion flange. Torque
the U-bolt nuts to 8-15 ft. lbs.
U-JOINT REMOVAL & INSTALLATION
- Position the driveshaft assembly in a vise.
- Remove the snaprings which retain the bearings in the slip yoke (front only) and in the
driveshaft (front and rear).
- Using a large punch or an arbor press, drive one of the bearings in toward the center of
the universal joint, forcing the opposite bearing out.
- As each bearing is pressed or punched far enough out of the universal joint assembly,
grip it with a pair of pliers, and pull it from the driveshaft yoke. Drive or press the
spider in the opposite direction to make the opposite bearing accessible, and pull it free.
Remove all bearings from both universal joints.
- After removing the bearings, lift the spider from the yoke.
- Thoroughly clean all dirt and foreign matter from the yoke area on both ends of the
driveshaft. When installing new bearings within the yokes, it is advisable to use an arbor
press. However, if this tool is not available, the bearings should be driven into position
with extreme care, as a heavy jolt on the needle bearings can easily damage or misalign
- Start a new bearing into the yoke at the rear of the driveshaft.
- Position a new spider in the rear yoke and press (or drive) the new bearing 1/4 inch
below the outer surface of the yoke.
- With the bearing in position, install a new snapring.
- Start a new bearing into the opposite side of the yoke.
- Press (or drive) the bearing until the opposite bearing, which you have just installed,
contacts the inner surface of the snapring.
- Install a new snapring on the second bearing. It may be necessary to grind the surface of
this second snapring to ease installation.
- Reposition the driveshaft in the vise, to work on the front universal joint.
- Install the new bearings, new spider, and new snaprings in the same manner as for the
rear universal joint.
- Position the slip yoke on the spider. Install new bearings, nylon thrust bearings
(1967-1971 cars only), and snaprings.
- Check both reassembled joints for freedom of movement. If misalignment of any part is
causing a bind, a sharp rap on the side of the yoke with a brass hammer should seat the
bearing needles, and provide freedom of movement. Care should be used to firmly support the
shaft end during this operation, as well as to prevent blows to the bearings themselves.
Under no circumstances should a driveshaft be installed if there is any bind in the universal