Drive Pinion and Ring Gear Replacement 8.6 Inch, 9.5 Inch, 11.5 Inch Axles
Tools Required
• | J 22536 Pinion
Remover (8.6 inch, 9.5 inch axles) |
• | J 44421 Pinion
Remover (11.5 inch axle) |
Removal Procedure
- Raise the vehicle. Refer to
Lifting and Jacking the Vehicle
in General Information.
- Remove the tire and wheel assemblies (8.6 inch, 9.5 inch
axles). Refer to
Tire and Wheel Removal and Installation
in Tires and Wheels.
- Remove the brake calipers (8.6 inch, 9.5 inch axles).
Refer to
Rear Brake Caliper Replacement
in Disc Brakes.
- Remove the brake rotors (8.6 inch, 9.5 inch axles).
Refer to
Rear Brake Rotor Replacement
in Disc Brakes.
- Remove the axle shafts. Refer to
Rear Axle Shaft Replacement
(8.6 inch, 9.5 inch axles)
or
Rear Axle Shaft and/or Gasket Replacement
(11.5 inch axles).
- Remove the differential. Refer to
Differential Replacement
.
- Remove the pinion yoke and the seal. Refer to
Drive Pinion Flange/Yoke and/or Oil Seal Replacement
.
- Install the J 22536
(8.6 inch, 9.5 inch axle) or the J 44421
(11.5 inch axle) as shown.
Ensure that the J 22536
or the J 44421
is firmly seated on the pinion.
- Drive the pinion out using the J 22536
(8.6 inch, 9.5 inch axle) or the J 44421
(11.5 inch axle) and a hammer.
Strike the J 22536
or the J 44421
slowly. Do not let the pinion fall out of the rear axle housing.
- Remove the collapsible
spacer from the pinion. Discard the spacer.
- Remove the pinion bearings and the cups. Refer to
Drive Pinion Bearings Replacement
.
Important: The ring gear bolts on the 8.6 inch, the 9.5 inch, and
the 10.5 inch axles have left-hand threads. The ring gear bolts on
the 11.5 inch axle have right-hand threads.
- Remove the gear bolts. Discard the bolts.
Notice: Do not pry the ring gear from the differential case. Prying the ring
gear from the differential case may cause damage to the ring gear and/or the
differential case.
- Remove the ring gear
from the differential. Drive the gear off with a brass drift if necessary.
Installation Procedure
Important: The mating surface of the ring gear and the differential case must be
clean and free of burrs before installing the ring gear.
- Install the ring gear
to the differential case.
- Install two threaded studs into the ring gear on opposite sides.
- Place the ring gear on the case. Align the studs with the holes
in the case.
Notice: Refer to Fastener Notice in the Preface section.
- Install the new left-hand threaded ring gear bolts. Tighten the ring
gear bolts alternately and in stages, gradually pulling the
ring gear onto the differential case.
Tighten
• | For the 8.6 inch axle, tighten the ring gear bolts in sequence
to 120 N·m (89 lb ft). |
• | For the 9.5 inch axle, tighten the ring gear bolts in sequence
to 140 N·m (103 lb ft). |
• | For the 11.5 inch axle, tighten the ring gear bolts in
sequence to 237 N·m (175 lb ft). |
- Install the pinion bearing cups. Refer to
Drive Pinion Bearings Replacement
.
- Determine the selective shim thickness for the pinion gear. Refer
to
Pinion Depth Adjustment
.
- Install the selective shim onto the pinion.
- Install the inner pinion bearing to the pinion. Refer to
Drive Pinion Bearings Replacement
.
- Install a new collapsible spacer.
- Lubricate the pinion bearings with axle lubricant. Refer to
Fluid and Lubricant Recommendations
in Maintenance
and Lubrication.
- Install the pinion to the axle housing.
- Install the outer pinion bearing onto the pinion.
- Install a new pinion oil seal and the pinion yoke. Refer to
Drive Pinion Flange/Yoke and/or Oil Seal Replacement
.
- Install the differential. Refer to
Differential Replacement
.
- Perform a gear tooth contact pattern check on the pinion and the
ring gear. Refer to
Gear Tooth Contact Pattern Inspection
.
- Install the axle shafts. Refer to
Rear Axle Shaft Replacement
(8.6 inch, 9.5 inch
axle) or
Rear Axle Shaft and/or Gasket Replacement
(11.5 inch axle).
- Install the brake rotors (8.6 inch, 9.5 inch axle).
Refer to
Rear Brake Rotor Replacement
in Disc Brakes.
- Install the brake calipers (8.6 inch, 9.5 inch axle).
Refer to
Rear Brake Caliper Replacement
in Disc Brakes.
- Install the tire and wheel assemblies (8.6 inch, 9.5 inch
axle). Refer to
Tire and Wheel Removal and Installation
in Tires and Wheels.
- Fill the axle with lubricant. Use the proper fluid. Refer to
Approximate Fluid Capacities
and
Fluid and Lubricant Recommendations
in Maintenance
and Lubrication.
- Lower the vehicle.
Drive Pinion and Ring Gear Replacement 10.5 Inch Axle
Removal Procedure
- Raise the vehicle. Refer to
Lifting and Jacking the Vehicle
in General Information.
- Remove the differential. Refer to
Differential Replacement
.
- Remove the pinion gear bearing retainer. Refer to
Drive Pinion Housing and/or Seal Replacement
.
- Remove the pinion and the pinion bearings. Refer to
Drive Pinion Housing and/or Seal Replacement
.
- Remove the left handed threaded ring gear bolts. Discard the bolts.
Notice: Do not pry the ring gear from the differential case. Prying the ring
gear from the differential case may cause damage to the ring gear and/or the
differential case.
- Remove the ring gear from the differential. Drive the gear off with a brass drift if necessary.
Installation Procedure
- If the differential case has become separated, assemble the differential case by aligning the two arrows inside the differential case as shown.
Important: The mating surface of the ring gear and the differential case must be clean and free of burrs before installing the ring gear.
- Install the ring gear to the differential case.
Notice: Refer to Fastener Notice in the Preface section.
- Install the new left-hand threaded ring gear bolts. Tighten the ring gear bolts alternately and in stages, gradually pulling the ring gear onto the differential case.
Tighten
Tighten the ring gear bolts in sequence to 165 N·m (122 lb ft).
- Install the pinion and the pinion bearings. Refer to
Drive Pinion Housing and/or Seal Replacement
.
- Install the pinion gear bearing retainer. Refer to
Drive Pinion Housing and/or Seal Replacement
.
- Install the differential. Refer to
Differential Replacement
.
- Lower the vehicle.