REMOVAL & INSTALLATION
See Figures 1 and 2
See Figure 3
Special tools are needed for this job.
- Raise and support the vehicle and remove the rear wheels and brake drums.
- Mark the driveshaft and yoke for reassembly and disconnect the driveshaft from the rear yoke.
- With a socket on the pinion nut and an inch pound torque wrench, rotate the drive pinion several revolutions. Check and record the torque required to turn the drive pinion.
- Remove the pinion nut. Use a flange holding tool to hold the flange while removing the pinion nut. Discard the pinion nut.
- Matchmark the yoke to the drive pinion shaft for reassembly reference.
- Remove the rear yoke with a puller.
- Inspect the seal surface of the yoke and replace it with a new one if the seal surface is pitted, grooved, or otherwise damaged.
- Remove the pinion oil seal using tool J-9233.
- Before installing the new seal, coat the lip of the seal with rear axle lubricant.
- Install the seal, driving it into place with tool J-22661.
- Install the yoke on the pinion shaft. Align the marks made on the pinion shaft and yoke during disassembly.
- Install a new pinion nut. Tighten the nut until end-play is removed from the pinion bearing. Do not overtighten.
- Check the torque required to turn the drive pinion. The pinion must be turned several revolutions to obtain an accurate reading.
- Tighten the pinion nut to obtain the torque reading observed during disassembly (Step 3) plus 5 inch lbs. (0.56 Nm). Tighten the nut minimally each time, to avoid overtightening. Do not loosen and then retighten the nut.
If the desired torque is exceeded a new collapsible pinion spacer sleeve must be installed and the pinion gear preload reset.
- Install the driveshaft, aligning the matchmarks made during disassembly. Install the rear brake drums and wheels.
- Raise and safely support the vehicle on jackstands.
- Matchmark driveshaft to the yoke for reference during assembly and disconnect the driveshaft at the yoke.
- Remove the pinion shaft nut and washer.
- Remove the yoke from the pinion shaft, using a puller.
- Remove the pinion shaft oil seal with tool J-25180.
- Install the new seal with a suitable driver.
- Install the pinion shaft washer and nut. Tighten the nut to 210 ft. lbs. (285 Nm).
- Align the matchmarks on the driveshaft and yoke and install the driveshaft. Tighten the attaching bolts or nuts to 16 ft. lbs. (22 Nm).
- Remove the supports and lower the vehicle.