Semi-Floating Axle
Removal Procedure^ Tools Required
- J 5853-B Torque Wrench
- J 8614-01 Companion Flange Holder/Remover
- J 22388 Pinion Oil Seal Installer (94/z in ring gear axle)
- J 22836 Pinion Oil Seal Installer (81/z and 85/8 in ring gear axles)
- J 22804-1 Pinion Oil Seal Spacer
The pinion oil seal and the companion flange may be replaced with the carrier assembly installed in the vehicle.
1. Raise the vehicle on a hoist and support the vehicle with safety stands.
2. Remove the rear wheels and brake drums.
Important: Observe and accurately mark the positions of all driveline components relative to the propeller shaft and axles prior to disassembly. These components include the propeller shaft, drive axles, pinion flanges, output shafts, etc. Reassemble all components in the exact relationship the components had to each other during removal. Follow specifications and torque values. Follow any measurements made prior to disassembly.
3. Accurately marked the installed position of the rear propeller shaft.
4. Remove the propeller shaft.
^ Use a piece of tape in order to hold the bearing caps
^ Secure the propeller shaft so that the propeller shaft is out of the way
^ Do not put unnecessary stress on the universal joints in securing the propeller shaft
5. Use a J 5853-B in order to measure the torque required to turn the pinion.
6. Record the torque measurement, which gives the combined pinion bearing, seal, carrier bearing, axle bearing and seal preload.
7. Make an accurate alignment mark (1) on the pinion stem, pinion flange nut, and pinion flange (2).
8. Record the number of exposed threads on the pinion stem.
9. Hold the pinion flange with the J 8614-O1.
10. Remove the pinion flange nut and washer.
11. Use a container to catch any lubricant.
12. Remove the pinion flange using the J8614-O1 with the remover attachment.
Important: Avoid damaging the machined surfaces.
13. Pry the oil seal from the bore.
14. Thoroughly clean any foreign material from the contact area.
15. Replace any parts as necessary.
Installation Procedure
1. Install the oil seal into the bore using the J 22804-1 and either the J 22388 (9 1/2 inch ring gear axles) or the J 22836 (8 1/2 and 8 5/8 inch ring gear axles).
2. Turn the J 22804-1 from the installed position 180° to ensure proper installation against the pinion flange.
3. Lubricate the cavity between the new seal lips with a high melting point lubricant for bearings.
Important: Do not hammer the pinion flange onto the pinion stem.
4. Install the pinion flange using the J 8614-O1.
5. Use the alignment marks (1) in the installation of the pinion flange (2).
6. Install a washer and a new nut.
^ Tighten the nut on the pinion stem as close as possible to the alignment marks without going past the mark.
Notice: Refer to Fastener Notice in Service Precautions.
^ Use the record of the alignment marks and the thread count as a reference.
^ Tighten the nut a little at a time and turn the pinion flange several times after each tightening in order to set the rollers.
Important: If the preload torque value recorded earlier was less than 3 inch lbs., reset the torque specification to 3-5 inch lbs.
7. Measure the torque required to rotate the pinion using the J 5853-B.
8. Compare the measurement of the torque with the measurement made during the removal procedure.
9. Continue tightening and measuring a little at a time until the preload is achieved.
10. Install the propeller shaft.
11. Install the retainers and bolts.
^ Tighten the bolts to 20 Nm (15 ft. lbs.).
12. Install the rear wheels and brake drums.
13. Lubricate the rear axle as necessary.