Semi-Floating Axle 8-1/2, 8-5/8 and 9-1/2 Inch Ring Gear
- Tools Required:- J 8614-01 Companion Flange Holder:
- J 8614-02 Companion Flange Remover
- J 24388 Pinion Oil Seal Installer (American Axle 9 1/2 inch ring gear axle)
- J 22836 Pinion Oil Seal Installer (American Axle 8 1/2 and 8 5/8 inch ring gear axles)
- J 22804 Pinion Oil Seal Spacer
- The pinion oil seal and the companion flange may be replaced with the carrier assembly installed in the vehicle.
REMOVE OR DISCONNECT
- Raise the vehicle on a hoist and support with safety stands.
1. Rear wheels and drums.
Important:
- It is essential that the positions of all driveline components relative to the propeller shaft and axles be observed and accurately reference marked prior to disassembly. These components include the propeller shafts, drive axles, pinion flanges, output shafts, etc. All components must be reassembled in the exact relationship to each other as they were when removed. Specifications and torque values, as well as any measurements made prior to disassembly, must be followed.
- Accurately mark the installed position of the rear propeller shaft.
2. Propeller shaft.
A. Use a piece of tape to hold the bearing caps.
B. Secure the propeller shaft up and out of the way so as not to put unnecessary stress on the universal joints.
C. Measure, using an inch-pound torque wrench, the amount of torque required to turn the pinion. Record this measurement for reassembly. This will give combined pinion bearing, seal, carrier bearing, axle bearing and seal preload.
D. Make an accurate alignment mark on the pinion stem, pinion flange, and pinion flange nut. Also record the number of exposed threads on the pinion stem for reference.
3. Pinion flange nut and washer.
- Hold the pinion flange with J 8614-01.
4. Pinion flange using J 8614-01.
- Use container to catch lubricant.
5. Oil seal.
- Pry the oil seal from the bore. Do not damage the machined surfaces. Thoroughly clean foreign material from the contact area.
- Replace parts as necessary.
INSTALL OR CONNECT
NOTICE: Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact part number for that application. The manufacturer will call out those fasteners that require a replacement after removal. The manufacturer will also call out the fasteners that require thread lockers or thread sealant. UNLESS OTHERWISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion inhibitors on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and joint clamping force, and may damage the fastener. When you Install fasteners, use the correct tightening sequence and specifications. Following these instructions can help you avoid damage to parts and systems.
1. Oil seal into the bore using J 22804-1 and either J 22388 (9 1/2 inch ring gear) or J 22836 (8 1/2 and 8 5/8 ring gears). Turn J 22804-1 from installed position 180° to ensure proper installation against the pinion flange.
- Lubricate the cavity between the new seal lips with a high melting point bearing lubricant.
2. Pinion flange using J 8614-01.
- Use scribed marks for installation.
Important: Do not attempt to hammer the pinion flange onto the pinion stem.
3. Washer and a new nut.
- Tighten:
A. The nut on the pinion stem as close to the original marks as possible without going past the mark. Use the reference mark and the thread count as reference.
B. The nut a little at a time and turn the pinion flange several times after each tightening to set the rollers.
Measure
- Using an inch-pound torque wrench, the torque required to rotate the pinion. Compare this with the required rotating torque recorded earlier. Continue tightening and measuring a little at a time until the same preload is achieved.
Important:
- If the original preload torque value was less than 3 (inch lbs.) then reset the torque specification to 3-5 (inch lbs.).
- Align the propeller shaft with the alignment marks made previously.
4. Propeller shaft.
5. Retainers and bolts.
- Tighten bolts to 20 Nm (15 ft. lbs.).
6. Rear wheels and drums.
7. Lubricant to the rear axle as necessary.