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REAR SUSPENSION
HUB / BEARING
DESCRIPTION
The hub and bearing is a combined rear wheel hub
and wheel bearing unit. All vehicles are equipped
with permanently lubricated and sealed for life rear
hub and bearing assemblies. There is no periodic
lubrication or maintenance recommended for these
units.
The hub and bearing is mounted to the rear knuck-
le's spindle using a retaining nut. The tire and wheel
assembly, and rear brake drum or disc attaches to
the studs protruding from the hub flange with wheel
mounting studs.
OPERATION
The hub and bearing has internal bearings that
allow it to rotate with the tire and wheel.
DIAGNOSIS AND TESTING - HUB AND
BEARING
The rear hub and bearing assembly is designed for
the life of the vehicle and should require no mainte-
nance. The following procedure may be used for eval-
uation of bearing condition.
With wheel and brake drum removed, rotate
flanged outer ring of hub. Excessive roughness, lat-
eral play or resistance to rotation may indicate dirt
intrusion or bearing failure. If the rear wheel bear-
ings exhibit these conditions during inspection, the
hub and bearing assembly should be replaced.
Damaged bearing seals and resulting excessive
grease loss may also require bearing replacement.
Moderate grease loss from bearing is considered nor-
mal and should not require replacement of the hub
and bearing assembly.
REMOVAL
(1) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE).
(2) Remove rear wheel and tire assembly.
(3) If equipped with rear disc brakes, remove the
rear brake caliper and rotor. (Refer to 5 - BRAKES/
HYDRAULIC/MECHANICAL/ROTORS
AL). Remove the brake rotor by pulling the rotor
straight off the wheel mounting studs.
(4) If equipped with rear drum brakes, remove the
brake drum. (Refer to 5 - BRAKES/HYDRAULIC/
MECHANICAL/DRUM - REMOVAL)
(5) Remove dust cap from rear hub and bearing
assembly by prying it off.
(6) Remove hub and bearing retaining nut.
(7) Remove rear hub and bearing from the spindle
by pulling it straight off the spindle.
INSTALLATION
(1) Install the hub and bearing assembly on the
knuckle spindle. Install a NEW retaining nut.
Tighten the retaining nut to a torque of 250 N·m
(185 ft. lbs.).
(2) Install the hub and bearing dust cap using a
soft faced hammer.
(3) If equipped with rear disc brakes, install the
brake rotor and caliper. (Refer to 5 - BRAKES/HY-
DRAULIC/MECHANICAL/ROTOR - INSTALLATION)
(4) If equipped with rear drum brakes, install the
drum and adjust brake shoes as necessary. (Refer to
5 - BRAKES/HYDRAULIC/MECHANICAL/DRUM -
INSTALLATION)
(5) Install the rear tire and wheel assembly. Pro-
gressively tighten all wheel stud nuts in crisscross
pattern to 135 N·m (100 ft. lbs.) torque.
(6) Lower the vehicle.
KNUCKLE
DESCRIPTION
A cast iron rear knuckle is attached to each side of
the vehicle through the upper control arm and ball
joint, the rear shock assembly, the lateral links and
the trailing link. The knuckle serves as a mounting
point for the rear hub and bearing, tire and wheel,
and rear brakes.
OPERATION
The knuckle moves up and down with the tire and
wheel under jounce and rebound conditions while
acting as a mount for the rear hub and bearing, tire
and wheel, and rear brakes. The lateral movement of
the rear knuckle is controlled using two lateral arms
attached to the bottom of the knuckle and by the
upper control arm attached to the top of the knuckle.
DIAGNOSIS AND TESTING - KNUCKLE
Inspect the knuckle for physical damage. If it is
determined that the knuckle is cracked, bent or bro-
ken when servicing the vehicle, no attempt is to be
made to repair or to straighten the knuckle. The rear
knuckle is not a repairable component of the rear
-
REMOV-
suspension and must be replaced if found to be dam-
aged in any way.
REMOVAL
(1) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE).
(2) Remove rear wheel and tire assembly.
(3) If vehicle is equipped with antilock brakes
(ABS), remove rear wheel speed sensor from brake
flex hose routing bracket (Fig. 1).
JR
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