1996 CHRYSLER VOYAGER Service Manual

FRONT SUSPENSION
INDEX
page page
DESCRIPTION AND OPERATION
BALL JOINT............................ 11
COIL SPRING........................... 11
FRONT SUSPENSION DESCRIPTION......... 9
HUB AND BEARING ASSEMBLY............ 10
LOWER CONTROL ARM.................. 10
Mc PHERSON STRUT ASSEMBLY........... 10
STABILIZER BAR ATTACHING LINK.......... 10
STABILIZER BAR........................ 10
STEERING KNUCKLE.................... 10
SUSPENSION CRADLE (CROSSMEMBER)..... 9
WHEEL MOUNTING STUDS................ 11
DIAGNOSIS AND TESTING
BALL JOINT (LOWER).................... 12
HUB AND BEARING ASSEMBLY............ 12
LOWER CONTROL ARM.................. 12
Mc PHERSON STRUT.................... 11
STABILIZER BAR........................ 12
STEERING KNUCKLE.................... 12SERVICE PROCEDURES
SUSPENSION CRADLE THREAD REPAIR
PROCEDURE......................... 12
REMOVAL AND INSTALLATION
BALL JOINT............................ 22
FRONT WHEEL MOUNTING STUDS......... 28
HUB AND BEARING ASSEMBLY............ 25
LOWER CONTROL ARM.................. 19
Mc PHERSON STRUT.................... 13
REAR WHEEL MOUNTING STUDS.......... 29
STABILIZER BAR........................ 23
STEERING KNUCKLE.................... 14
DISASSEMBLY AND ASSEMBLY
BALL JOINT SEAL BOOT.................. 33
LOWER CONTROL ARM FRONT BUSHING.... 34
LOWER CONTROL ARM REAR BUSHING..... 35
Mc PHERSON STRUT.................... 30
STABILIZER BAR BUSHING................ 35
SPECIFICATIONS
FRONT SUSPENSION FASTENER TORQUES . . 36
SPECIAL TOOLS
FRONT SUSPENSION.................... 37
DESCRIPTION AND OPERATION
FRONT SUSPENSION DESCRIPTION
An independent Mc Pherson Strut type front sus-
pension is used on these vehicles. Vertical shock
absorbing Mc Pherson Struts attach to the top of the
steering knuckle and to the front strut tower. This
interconnection between the steering knuckle and the
body of the vehicle, provides for the correct steering
knuckle position. This steering knuckle position pro-
vides for the correct front Caster and Camber set-
tings for the vehicle, at the time the vehicle is
designed.
Lower control arms are attached inboard to the
cast aluminum front suspension cradle and outboard
to the bottom of the steering knuckle. Attachment of
the lower control arm to the steering knuckle is done
through a ball joint in the lower control arm.
During steering maneuvers, the strut and the
steering knuckle (through the ball joint and a pivot
bearing in the strut's upper retainer) turn as an
assembly.
SUSPENSION CRADLE (CROSSMEMBER)
This vehicle uses a one piece cast aluminum cradle
for the front suspension. The cradle is used as theattaching points for the lower control arms, stabilizer
bar and steering gear. The cradle also has the power
steering hoses and the chassis brake tubes attached
to it.
The cradle is mounted to the front frame rails at
four points, two on each side of the vehicle. The cra-
dle is isolated from the body of the vehicle using four
isolators, one located at each mounting bolt location.
WARNING: If a threaded hole in the suspension
cradle needs to be repaired, only use the type of
thread insert and installation procedure specified
for this application.
The threaded holes in the cradle that are
used for attachment of the lower control arm
rear bushing retainer, power steering hose and
chassis brake tubes can be repaired. The repair
is done by the installation of a Heli-Coilt
thread insert which has been specifically devel-
oped for this application. Refer to the Mopar
Parts Catalog for the specified Heli-Coil thread
insert to be used for this application. The pro-
cedure for installing the Heli-Coiltthread
insert is detailed in the Service Procedures sec-
tion in this group of the service manual.
NSSUSPENSION 2 - 9

Mc PHERSON STRUT ASSEMBLY
The front suspension of the vehicle is supported by
coil springs positioned around the strut assembly.
The springs are contained between an upper seat,
located just below the top strut mount assembly and
a lower spring seat on the strut fluid reservoir.
The top of each strut assembly is bolted to the
upper fender reinforcement (strut tower) through a
rubber isolated mount.
The bottom of the strut assembly attaches to the
steering knuckle with two through bolts. Caster is a
fixed setting on all vehicles and is not adjustable
when an alignment is performed. In the event the
camber setting on a vehicle requires adjustment, a
service strut is available which will provide a method
by which the camber can be adjusted.
The strut assemblies on this vehicle are inter-con-
nected by the front stabilizer bar through 2 link
assemblies attaching the struts to the stabilizer bar.
STEERING KNUCKLE
The steering knuckle (Fig. 1) is a single casting
with legs machined for attachment of the strut
damper, steering linkage, disc brake caliper, and
lower control arm ball joint. The steering knuckle
also has the front hub/bearing assembly mounted to
it. The hub is positioned through the bearing and
knuckle, with the constant velocity stub shaft splined
through the hub.
LOWER CONTROL ARM
The lower control arm is an iron casting. The lower
control arm is mounted to and isolated from the body
of the vehicle using 2 types of rubber bushings. The
front lower control arm bushing is the spool type and
is pressed into the lower control arm, while the rear
uses a bushing that is pushed over a stem on the
lower control arm. The front and rear of the lower
control arm is mounted to the cast crossmemberusing a pivot bolt through the center of the front
pivot bushing, and a retainer which traps the rear
bushing in the crossmember.
The ball joint is pressed into the control arm and
has a non-tapered stud with a notch for clamp bolt
clearance. The stud is clamped and locked into the
steering knuckle leg with a clamp bolt.
The ball joint is lubricated for the life of the vehi-
cle and does not require any periodic lubrication.
STABILIZER BAR
The stabilizer bar interconnects both Mc Pherson
strut assemblies of the vehicle and is attached
through rubber isolator bushings to the front suspen-
sion cradle
Jounce and rebound movements affecting one
wheel are partially transmitted to the opposite wheel
to stabilize body roll.
Attachment of the stabilizer bar to the front sus-
pension cradle is through 2 rubber-isolator bushings
and bushing retainers. The stabilizer bar to Mc Pher-
son strut assembly attachment is done utilizing a
sway bar attaching link. All parts of the stabilizer
bar are serviceable, and the stabilizer bar to cross-
member bushings are split for easy removal and
installation. The split in the stabilizer bar to cross-
member bushing should be positioned toward the
rear of the vehicle, with the square corner down
toward the ground, when the stabilizer bar is
installed in the vehicle.
STABILIZER BAR ATTACHING LINK
The stabilizer bar attaching links are used to
attach each end of the stabilizer bar to the front
strut assemblies. This reduces the fore-and-aft rate of
the stabilizer bar from the rest of the vehicle's front
suspension.
HUB AND BEARING ASSEMBLY
The Unit III Front Hub and Bearing Assembly is
used on all front wheel drive vans.
All hub and bearing assemblies mount to the steer-
ing knuckle the same way, but very by the wheel size
on the vehicle. Vehicles equipped with 14 inch wheels
have a 4 inch wheel mounting stud pattern. Vehicles
equipped with 15 inch wheels have a 4 1/2 inch
wheel mounting stud pattern. If a hub and bearing
assembly needs to be replaced, be sure that the
replacement assembly has the same size wheel
mounting stud pattern as the original part.
This unit is serviced only as a complete assembly.
It is mounted to the steering knuckle by four mount-
ing bolts that are removed from the rear of the steer-
ing knuckle.
Fig. 1 Front Steering Knuckle
2 - 10 SUSPENSIONNS
DESCRIPTION AND OPERATION (Continued)

COIL SPRING
Coil springs are rated separately for each corner or
side of the vehicle depending on optional equipment
and type of vehicle service. During service procedures
when both springs are removed, mark springs to
ensure installation in original position. Each coil
spring comes with a plastic sleeve on the second coil
of the spring. This plastic sleeve is a noise insulator
for the coil spring.
NOTE: If coil springs require replacement, be sure
that the springs needing replacement, are replaced
with springs meeting the correct load rating for the
vehicle and its specific options.
BALL JOINT
The ball joint (Fig. 2) is pressed into the lower con-
trol arm. The ball joint has a non-tapered stud with
a notch (Fig. 2) to provide clearance for the steering
knuckle clamp bolt and to provide retention of the
ball stud in the steering knuckle. The ball joint stud
is clamped and locked into the steering knuckle leg
using a pinch bolt. The ball joint used on this vehicle
is replaceable and if found defective can be serviced
as a separate component of the lower control arm
assembly.
WHEEL MOUNTING STUDS
If wheel attaching studs need to be replaced in the
hub and bearing assembly the studsCAN NOTbe
hammered out of the hub flange. If a stud is removed
by hammering it out of the bearing flange, damage to
the hub and bearing assembly will occur leading to
premature bearing failure.
Use the procedure and special tools shown in the
service procedures section for the wheel mounting
studs when replacing the wheel attaching studs.
The hub and bearing assembly does not require
removal from the steering knuckle or the rearknuckle to replace the wheel attaching studs in the
hub and bearing assembly.
DIAGNOSIS AND TESTING
Mc PHERSON STRUT
(1) Inspect for damaged or broken coil springs (Fig. 3).
(2) Inspect for torn or damaged strut assembly
dust boots (Fig. 3).
(3) Inspect the coil spring isolator on the lower
spring seat, (Fig. 3) for any signs of damage or dete-
rioration.
(4) Lift dust boot (Fig. 4) and inspect strut assembly for
evidence of fluid running from the upper end of fluid res-
ervoir. (Actual leakage will be a stream of fluid running
down the side and dripping off lower end of unit). A slight
amount of seepage between the strut rod and strut shaft
seal is not unusual and does not affect performance of the
strut assembly (Fig. 4). Also inspect jounce bumpers for
signs of damage or deterioration.
Fig. 2 Ball Joint Assembly
Fig. 3 Mc Pherson Strut Assembly Inspection
Fig. 4 Strut Assembly Leakage Inspection
NSSUSPENSION 2 - 11
DESCRIPTION AND OPERATION (Continued)