Chrysler Town, Dodge Caravan. Manual — part 12
FRONT SUSPENSION
DESCRIPTION - FRONT SUSPENSION
This vehicle has a MacPherson Strut type front
suspension (Fig. 1).
OPERATION - FRONT SUSPENSION
The front suspension allows each wheel on a vehi-
cle to adapt to different road surfaces and conditions
without greatly affecting the opposite wheel and the
ability to control the vehicle. Each side of the front
suspension is allowed to pivot so the vehicle can be
steered in the direction preferred.
A strut assembly is used in place of the front sus-
pension upper control arm and upper ball joint.
When a vehicle strikes a bump, the force is trans-
ferred through the hub, bearing, and knuckle, into
the strut assembly to absorb the force and dampen it.
The top of the strut is mounted directly to the strut
tower of the vehicle. During steering maneuvers, the
strut assembly (through a pivot bearing in the upper
strut mount) and steering knuckle (through the lower
ball joint) turn as an assembly.
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.
Fig. 1 Front Suspension
1 - TOWER
2 - CROSSMEMBER TAPPING PLATES
3 - LEFT STRUT ASSEMBLY
4 - LEFT STEERING KNUCKLE (WITH HUB AND BEARING)
5 - STABILIZER BAR LINK
6 - STABILIZER BAR
7 - LEFT LOWER CONTROL ARM
8 - CRADLE/CROSSMEMBER
9 - CRADLE/CROSSMEMBER REINFORCEMENT
10 - BALL JOINT
11 - ISOLATOR BUSHING
12 - STEERING GEAR TIE ROD
13 - RIGHT STEERING KNUCKLE
14 - RIGHT HUB AND BEARING
15 - RIGHT STRUT ASSEMBLY
2 - 2
FRONT SUSPENSION
RS
SPECIFICATIONS
FRONT SUSPENSION FASTENER TORQUE
DESCRIPTION
N·m
Ft.
Lbs.
In.
Lbs.
Ball Joint Nut
108
80
—
Cradle Crossmember
Mounting Bolts
163
120
—
Cradle Crossmember
Reinforcement Bolts - Size
M-14
153
113
—
Cradle Crossmember
Reinforcement Bolt - Size
M-12
106
78
—
Cradle Crossmember
Reinforcement Bolts - Size
M-10
61
45
—
Disc Brake Adapter
Mounting Bolts
169
125
—
Hub And Bearing Mounting
Bolts
65
45
—
Hub And Bearing Axle Hub
Nut
244
180
—
Lower Control Arm Pivot
Bolt
183
135
—
Stabilizer Bar Bushing
Retainer Bolts
68
50
—
Stabilizer Bar Link Nuts
88
65
—
Strut Body/Tower Mounting
Nuts
28
21
250
Strut Clevis-to-Knuckle Nuts
81 +
90°
turn
60 +
90°
turn
—
Strut Shaft Nut
100
75
—
Tie Rod Adjuster Jam Nut
75
55
—
Tie Rod Steering Arm Nut
75
55
—
Wheel Mounting (Lug) Nuts
135
100
—
SPECIAL TOOLS
FRONT SUSPENSION
Puller C-3894A
Press, Ball Joint C-4212F
Installer, Ball Joint 6758
Wrench, Strut Rod Nut 6864
RS
FRONT SUSPENSION
2 - 3
FRONT SUSPENSION (Continued)
BUSHINGS
REMOVAL - STABILIZER BAR CUSHION
(1) Raise Vehicle. Refer to Hoisting in Lubrication
and Maintenance.
(2) Remove the 2 bolts fastening the emission leak
detection pump to the cradle crossmember reinforce-
ment.
(3) Move the leak detection pump to the side
allowing access to the stabilizer bar cushion retain-
ers.
(4) Remove the nut and bolt securing each stabi-
lizer bar cushion retainer to the cradle crossmember
(Fig. 2) and remove the retainers.
(5) Remove each stabilizer bar cushion from the
stabilizer bar by opening the slit in the cushion and
peeling it off the stabilizer bar.
INSTALLATION - STABILIZER BAR CUSHION
(1) Install each new cushion on stabilizer bar by
spreading cushion at slit and forcing it onto stabilizer
bar.
NOTE: Cushions must be installed on stabilizer bar
so the square corner of the bushing will be down
and slit in cushion will be facing the rear of the
vehicle when the stabilizer bar is installed (Fig. 3).
(2) Place stabilizer bar into mounted position with
cushions properly aligned.
(3) Hook each retainer into cradle crossmember
mounting hole and over cushion.
(4) Install each mounting bolt from rear of cradle
crossmember through retainer. Install the two nuts
and tighten to 68 N·m (50 ft. lbs.) torque.
(5) Reattach emission leak detection pump to cra-
dle crossmember reinforcement with two mounting
bolts.
(6) Lower the vehicle.
REMOVER/INSTALLER, BUSHING 8460
REMOVER/INSTALLER, BALL JOINT 8490
Fig. 2 Front Stabilizer Bar Cushion Retainers
1 - STEERING GEAR
2 - STABILIZER BAR
3 - RAISED BEAD
4 - FRONT CRADLE CROSSMEMBER
5 - RETAINERS
Fig. 3 Correctly Installed Stabilizer Bar Cushion
1 - SLIT IN SWAY BAR BUSHING.
2 - SQUARE CORNER
3 - SWAY BAR
4 - SWAY BAR ISOLATOR BUSHING
2 - 4
FRONT SUSPENSION
RS
FRONT SUSPENSION (Continued)
HUB / BEARING
DESCRIPTION
The front wheel bearing and front wheel hub of
this vehicle are a hub and bearing unit type assem-
bly (Unit III). This unit combines the front wheel
mounting hub (flange) and the front wheel bearing
into a sealed one-piece unit. The hub and bearing is
mounted to the center of the steering knuckle (Fig.
1). It is retained by four mounting bolts accessible
from the inboard side of the steering knuckle. The
hub flange has five wheel mounting studs.
The wheel mounting studs used to mount the tire
and wheel to the vehicle are the only replaceable
components of the hub and bearing assembly. Other-
wise, the hub and bearing is serviced only as a com-
plete assembly.
OPERATION
The hub and bearing has internal bearings that
allow the hub to rotate with the driveshaft, along
with the tire and wheel. The five wheel mounting
studs mount the tire and wheel, and brake rotor to
the vehicle.
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
is more noticeable at speeds above 105 km/h (65
mph).
REMOVAL
NOTE: Replacement of the Unit III front hub/bearing
assembly can be normally done without having to
remove the steering knuckle from the vehicle. In the
event that the hub/bearing is frozen in the steering
knuckle and cannot be removed by hand, it will
have to be pressed out of the steering knuckle. The
steering knuckle will require removal from the vehi-
cle to allow the hub/bearing assembly to be
pressed out of the steering knuckle. (Refer to 2 -
SUSPENSION/FRONT/KNUCKLE - REMOVAL)
(1) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
(2) Remove wheel lug nuts, and front tire and
wheel assembly.
(3) Remove the cotter pin, nut lock and spring
washer from the stub axle (Fig. 4).
(4) With aid of a helper applying the brakes to
keep the front hub from turning, remove the hub nut
(Fig. 4).
(5) Remove disc brake caliper and adapter as an
assembly from knuckle as shown (Fig. 5). Hang
assembly out of the way using a bungee cord or wire.
Do not allow caliper hang by brake hose.
(6) Remove brake rotor from hub and bearing (Fig.
5).
(7) Push in on end of driveshaft stub shaft, push-
ing its splines out of the hub splines.
(8) Remove the four hub and bearing mounting
bolts from the rear of steering knuckle (Fig. 6). Use
care not to come in contact with and damage
the ABS tone wheel on the driveshaft stub shaft
upon bolt removal.
(9) Remove the hub and bearing assembly from
the steering knuckle.
INSTALLATION
CAUTION: Hub and bearing assembly mounting
surfaces on the steering knuckle and stub axle (Fig.
7) must be smooth and completely free of foreign
material or nicks prior to installing hub and bearing
assembly.
Fig. 4 Hub Nut
1 - HUB NUT
2 - NUT LOCK
3 - COTTER PIN
4 - SPRING WASHER
RS
FRONT SUSPENSION
2 - 5
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