Chrysler Pacifica. Manual — part 421
SUSPENSION
TABLE OF CONTENTS
page
page
SUSPENSION
STANDARD PROCEDURE - LUBRICATION
. . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . 38
SUSPENSION
STANDARD PROCEDURE - LUBRICATION
There are no serviceable lubrication points on the
front suspension. The ball joints are sealed-for-life
and require no maintenance. The lower ball joints
have special grease fitting caps that prevent normal
grease gun attachment. This has been done to elimi-
nate the possibility of over-filling, damaging the non-
vented seal. Do not attempt to remove the special
grease fitting cap and replace it with a normal grease
zirc fitting.
CAUTION: No attempt should be made to replace
the ball joint grease fitting cap with a normal zirc
fitting or fill the ball joint with grease. Damage to
the grease seal can result.
FRONT SUSPENSION
TABLE OF CONTENTS
page
page
FRONT SUSPENSION
. . . . . . . . . . . . . . . . . . . . . . . . . . 2
FRONT SUSPENSION FASTENER TORQUE
. . . . . . . . . . . . . . . . . . . 2
HUB / BEARING
DIAGNOSIS AND TESTING - HUB AND
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
. . . . . . . . . . . . . . . . . . . . . . . . . . 4
KNUCKLE
. . . . . . . . . . . . . . . . . . . . . . . . . . 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . 7
LOWER BALL JOINT
DIAGNOSIS AND TESTING - LOWER BALL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
LOWER BALL JOINT SEAL BOOT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . 8
LOWER CONTROL ARM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
. . . . . . . . . . . . . . . . . . . . . . . . . . . 9
. . . . . . . . . . . . . . . . . . . . . . . . . 10
STABILIZER BAR
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
. . . . . . . . . . . . . . . . . . . . . . . . . . 10
. . . . . . . . . . . . . . . . . . . . . . . . . 11
STRUT ASSEMBLY
. . . . . . . . . . . . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . . . . . . . . . . . . . 13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
. . . . . . . . . . . . . . . . . . . . . . . . . 14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
. . . . . . . . . . . . . . . . . . . . . . . . . 17
CS
SUSPENSION
2 - 1
FRONT SUSPENSION
DESCRIPTION
This vehicle is equipped with a MacPherson Strut
type front suspension. The front suspension consists
of the following major components:
• Hub And Bearing
• Knuckle
• Lower Control Arm
• Stabilizer Bar
• Strut Assembly
SPECIFICATIONS
FRONT SUSPENSION FASTENER TORQUE
DESCRIPTION
N·m
Ft.
Lbs.
In.
Lbs.
Ball Joint Nut
81 +
90°
turn
60 +
90°
turn
—
Brake Caliper Adapter
Mounting Bolts
169
125
—
Engine Cradle Mounting
Bolts
163
120
—
Hub And Bearing Mounting
Bolts
65
45
—
Hub And Bearing Axle Hub
Nut
244
180
—
Lower Control Arm Frame
Bolts
163
120
—
Stabilizer Bar Cushion
Retainer Bolts
54
40
—
Stabilizer Bar Link Nuts
88
65
—
Strut Body/Tower Mounting
Nuts
28
21
250
Strut Clevis-to-Knuckle Nuts
88 +
90°
turn
65 +
90°
turn
—
Strut Shaft Nut
100
75
—
Tie Rod Adjuster Jam Nut
75
55
—
Tie Rod Steering Arm Nut
47 +
180°
turn
35 +
180°
turn
—
Wheel Mounting (Lug) Nuts
135
100
—
SPECIAL TOOLS
FRONT SUSPENSION
HUB / BEARING
DIAGNOSIS AND TESTING - HUB AND
BEARING
The condition of the front hub and bearing assem-
bly is diagnosed using the inspection and testing pro-
cedure detailed below.
The bearing contained in the Unit III front hub/
bearing assembly will produce noise and vibration
when worn or damaged. The noise will generally
change when the bearings are loaded. A road test of
the vehicle is normally required to determine the
location of a worn or damaged bearing.
Find a smooth level road surface and bring the
vehicle up to a constant speed. When vehicle is at a
constant speed, swerve the vehicle back and forth
from the left and to the right. This will load and
unload the bearings and change the noise level.
When bearing damage is slight, the noise is some-
times noticeable at lower speeds and at other times
Puller, Tie Rod C-3894-A
Installer, Ball Joint 6758
Wrench, Strut Rod Nut 6864
2 - 2
FRONT SUSPENSION
CS
is more noticeable at speeds above 105 km/h (65
mph).
REMOVAL
NOTE: Replacement of front hub and bearing
assembly can normally be done without having to
remove steering knuckle from vehicle. In event that
hub/bearing is frozen in steering knuckle and can-
not be removed by hand, it will have to be pressed
out of steering knuckle. Steering knuckle will then
require removal before hub and bearing can be
pressed out. (Refer to 2 - SUSPENSION/FRONT/
KNUCKLE - REMOVAL)
(1) Raise and support vehicle. (Refer to LUBRICA-
TION & MAINTENANCE/HOISTING - STANDARD
PROCEDURE)
(2) Remove tire and wheel assembly.
(3) Remove cotter pin, nut lock and spring washer
from halfshaft stub shaft (Fig. 1).
(4) With aid of a helper applying brakes to keep
front hub from turning, remove hub nut (Fig. 1).
(5) Access and remove front brake rotor. (Refer to
5 - BRAKES/HYDRAULIC/MECHANICAL/ROTOR -
REMOVAL)
(6) Disconnect vehicle wiring harness from wheel
speed sensor connector (Fig. 2).
(7) Unclip wheel speed sensor connector and rout-
ing clip from frame rail outer reinforcement (Fig. 2).
(8) Remove screw fastening wheel speed sensor
routing bracket to strut assembly (Fig. 3).
(9) Open routing clip at knuckle and remove wheel
speed sensor cable (Fig. 4).
(10) Push in on end of halfshaft stub shaft, push-
ing its splines out of hub splines.
(11) Remove four hub and bearing mounting bolts
from rear of steering knuckle (Fig. 5).
(12) Remove hub and bearing with wheel speed
sensor from steering knuckle.
Fig. 1 Cotter Pin, Nut Lock, And Spring Washer
1 - HUB NUT
2 - NUT LOCK
3 - COTTER PIN
4 - SPRING WASHER
Fig. 2 Brake Hose And Wheel Speed Sensor
Connections
1 - WIRING HARNESS CONNECTOR
2 - WHEEL SPEED SENSOR CONNECTOR
3 - ROUTING CLIP
4 - PORT ON BRAKE CALIPER
5 - COPPER SEALING WASHER
6 - BRAKE HOSE BANJO FITTING
7 - BANJO BOLT
Fig. 3 Wheel Speed Sensor Mounting To Strut
1 - STRUT ASSEMBLY
2 - SCREW
3 - WHEEL SPEED SENSOR ROUTING BRACKET
CS
FRONT SUSPENSION
2 - 3
HUB / BEARING (Continued)
INSTALLATION
CAUTION: Hub and bearing mounting surfaces on
steering knuckle and stub shaft (Fig. 6) must be
smooth and completely free of foreign material or
nicks prior to installing hub and bearing assembly.
(1) Install hub and bearing onto halfshaft stub
shaft and into steering knuckle until squarely seated
on face of steering knuckle.
(2) Install four hub and bearing mounting bolts
from rear of knuckle. Progressively and equally
tighten all four mounting bolts using a criss-cross
pattern. Tighten mounting bolts to 65 N·m (45 ft.
lbs.) torque.
(3) Place wheel speed sensor cable grommet in clip
at knuckle (Fig. 4). Close clip.
(4) Attach wheel speed sensor routing bracket to
strut assembly (Fig. 3). Tighten screw to 13 N·m (115
in. lbs.) torque.
(5) Clip wheel speed sensor connector and routing
clip to frame rail outer reinforcement (Fig. 2).
(6) Connect vehicle wiring harness to wheel speed
sensor connector (Fig. 2).
(7) Install brake rotor, then install disc brake cal-
iper and adapter assembly. (Refer to 5 - BRAKES/
HYDRAULIC/MECHANICAL/ROTOR
-
INSTALLATION)
(8) Verify that wheel speed sensor is not routed
improperly allowing cable to come in contact with
brake rotor or other moving parts.
(9) Install washer and hub nut on end of halfshaft
stub shaft (Fig. 1). With aid of a helper applying
brakes to keep front hub from turning, tighten hub
nut to 244 N·m (180 ft. lbs.) torque.
(10) Install spring washer and hub nut lock over
hub nut and stub shaft. Install a NEW cotter pin
securing nut lock in place and tightly wrap cotter pin
prongs around nut lock.
(11) Install tire and wheel assembly (Refer to 22 -
TIRES/WHEELS - INSTALLATION). Tighten wheel
mounting nuts to a torque of 135 N·m (100 ft. lbs.).
(12) Lower vehicle.
(13) Pump brake pedal several times to ensure
vehicle has a firm brake pedal before moving vehicle.
Fig. 4 Sensor Mounting To Front Hub And Bearing
1 - MOUNTING SCREW
2 - HUB AND BEARING
3 - ROUTING CLIP
4 - FRONT WHEEL SPEED SENSOR
Fig. 5 Hub And Bearing Mounting Bolts
1 - KNUCKLE
2 - HUB AND BEARING MOUNTING BOLTS
3 - HALFSHAFT
Fig. 6 Hub And Bearing Assembly (Typical)
1 - HALFSHAFT OUTER C/V JOINT
2 - STUB SHAFT
3 - THESE SURFACES MUST BE CLEAN AND FREE OF NICKS
BEFORE INSTALLING BEARING ASSEMBLY
4 - STEERING KNUCKLE
2 - 4
FRONT SUSPENSION
CS
HUB / BEARING (Continued)
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