Chrysler New Yorker. Manual - part 13

REAR SUSPENSION

INDEX

page

GENERAL INFORMATION

SUSPENSION CAUTIONS . . . . . . . . . . . . . . . . . 38

DESCRIPTION AND OPERATION

COIL SPRING . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
LATERAL LINKS . . . . . . . . . . . . . . . . . . . . . . . . . 39
REAR SUSPENSION CROSSMEMBER . . . . . . . 39
REAR SUSPENSION SYSTEM . . . . . . . . . . . . . . 38
SPINDLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
STABILIZER BAR . . . . . . . . . . . . . . . . . . . . . . . . 40
STRUT ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . 38
TRAILING ARM . . . . . . . . . . . . . . . . . . . . . . . . . 39

DIAGNOSIS AND TESTING

LATERAL LINKS . . . . . . . . . . . . . . . . . . . . . . . . . 40
SPINDLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
STABILIZER BAR AND BUSHINGS . . . . . . . . . . . 41
STABILIZER BAR ATTACHING LINKS . . . . . . . . . 41
STRUT ASSEMBLY AND COIL SPRING . . . . . . . 40
TRAILING ARM . . . . . . . . . . . . . . . . . . . . . . . . . 40

REMOVAL AND INSTALLATION

LATERAL LINKS . . . . . . . . . . . . . . . . . . . . . . . . . 47
REAR HUB AND BEARING . . . . . . . . . . . . . . . . . 46
REAR SPINDLE . . . . . . . . . . . . . . . . . . . . . . . . . 44
REAR SUSPENSION CROSSMEMBER . . . . . . . 50
REAR WHEEL MOUNTING STUDS . . . . . . . . . . 54
STABILIZER BAR . . . . . . . . . . . . . . . . . . . . . . . . 52
STRUT ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . 41
TRAILING ARM . . . . . . . . . . . . . . . . . . . . . . . . . 49

DISASSEMBLY AND ASSEMBLY

REAR SUSPENSION CROSSMEMBER

BUSHINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

STRUT ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . 54

SPECIFICATIONS

REAR SUSPENSION FASTENER TORQUE

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . 58

SPECIAL TOOLS

REAR SUSPENSION . . . . . . . . . . . . . . . . . . . . . 58

GENERAL INFORMATION

SUSPENSION CAUTIONS

CAUTION: Only frame contact or wheel lift hoisting
equipment can be used on vehicles having a fully
independent rear suspension. Vehicles with inde-
pendent rear suspension can not be hoisted using
equipment designed to lift a vehicle by the rear
axle. If this type of hoisting equipment is used dam-
age to rear suspension components will occur.

NOTE: If a rear suspension component becomes
bent, damaged or fails, no attempt should be made
to straighten or repair it. Always replace with a new
component.

DESCRIPTION AND OPERATION

REAR SUSPENSION SYSTEM

The rear suspension used on this vehicle is a fully

independent rear suspension.

A forged rear spindle bolts to each rear strut

assembly. The movement of the rear spindle is con-
trolled laterally using lateral links going from the
front and rear of the spindle to the rear cross mem-
ber. Fore and aft movement of the spindle is con-
trolled by a trailing arm.

The lateral links and trailing arm have rubber iso-

lator bushings at each end. The lateral links are
bolted to the rear crossmember, and the spindle. The
trailing arm bolts to the bottom of the spindle, and to
a bracket attached to the floor pan of the vehicle.

Lateral links, trailing arms, and spindles, are nor-

mally replaced only when the part has been damaged
or when the vehicle has been involved in an accident.
If a suspension part has been damaged, be sure to
check the underbody dimensions of the car. If the
underbody dimensions are not correct, the frame of
the vehicle must be straightened, before replacement
suspension components are installed.

STRUT ASSEMBLY

The rear strut assemblies support the weight of

the vehicle using coil springs positioned around the
struts. The coil springs are contained between the
upper mount of the strut assembly and a lower
spring seat on the body of the strut assembly.

The top of each strut assembly is bolted to the top

of the inner fender through a rubber isolated mount.

Strut attachment to the rear spindle is accom-

plished using a split collar on the rear spindle. The
collar uses a pinch bolt to retain the spindle to the
strut.

COIL SPRING

Rear coil springs are rated separately for each cor-

ner or side of the vehicle depending on optional

2 - 38

SUSPENSION

300M

equipment and type of vehicle service. During service
procedures when both rear coil springs are removed,
mark the coil springs to ensure installation of the
springs in their original position. If coil springs
require replacement, be sure the springs need-
ing replacement, are replaced with springs
meeting the correct load rating for the vehicle
and its specific options.

SPINDLE

A forged rear spindle bolts to each rear strut assem-

bly. The movement of the rear spindle is controlled
laterally using two lateral links attached to the spin-
dle. The outboard ends of the two lateral links are
mounted forward and rearward of the spindle center-
line, and the inboard ends are mounted to the rear
suspension crossmember. Fore and aft movement of
the knuckle is controlled by using a trailing arm.

LATERAL LINKS

The purpose of the lateral links is to control the

lateral movement of the rear spindle. The lateral
links have rubber isolator bushings at each end. The
lateral links are attached to the rear crossmember,
and the spindle, using a bolt and nut assembly at
each end of the link. The rear lateral link incorpo-
rates a threaded adjustment link to provide a means
for rear wheel Toe adjustment.

Lateral links are normally replaced only when the

part has been damaged or when the vehicle has been
involved in an accident. If a suspension part has
been damaged, be sure to check the underbody
dimensions of the car. If underbody dimensions of the
vehicle are not correct, the frame must be straight-

ened before replacement suspension components are
installed.

TRAILING ARM

The purpose of the trailing arm is to control the

fore and aft movement of the spindle. The trailing
arm has rubber isolator bushings at each end. Each
trailing arm is attached to the spindle and the body
of the vehicle. The trailing arm attaches to the rear
spindle through a bracket which is bolted to the bot-
tom of the spindle. The trailing arm attaches to the
body using a bracket attached to the frame rail and
rear torque box.

Trailing arms are normally replaced only when the

REAR SUSPENSION CROSSMEMBER

This vehicle is equipped with a aluminum alloy rear

suspension crossmember that spans the distance
between the rear frame rails (Fig. 1). It is isolated
from the frame rails with the use of rubber isolator
bushings. These bushings may be replaced separately.

The purpose of the rear suspension crossmember is

to support the lower end of the rear suspension
through the use of four lateral links. Two lateral
links are mounted on each end of the crossmember-
(Fig. 1).

Fig. 1 Rear Suspension Crossmember

300M

SUSPENSION

2 - 39

DESCRIPTION AND OPERATION (Continued)

STABILIZER BAR

The stabilizer bar interconnects both rear strut

assemblies and is attached to the rear frame rails of
the vehicle.

Jounce and rebound movements affecting one

wheel are partially transmitted to the opposite wheel
of the vehicle to stabilize body roll.

Attachment of the stabilizer bar to the rear frame

rails of the vehicle is through 2 rubber-isolator bush-
ings and bushing retainers. The stabilizer bar to
strut assembly attachment is done utilizing a rubber
isolated stabilizer bar attaching link. All parts of the
stabilizer bar are serviceable, and the stabilizer bar
to frame rail isolator bushings are split for easy
removal and installation. The split in the stabilizer
bar to crossmember bushing must be positioned
toward the front of the vehicle, when the stabilizer
bar is installed on the vehicle.

DIAGNOSIS AND TESTING

STRUT ASSEMBLY AND COIL SPRING

(1) Inspect for damaged or broken coil springs

(Fig. 2).

(2) Inspect for torn or damaged strut assembly

dust boots (Fig. 2).

(3) Inspect for damaged upper and lower spring

isolators (Fig. 2).

(4) Lift dust boot and inspect strut assembly for

evidence of fluid running from the upper end of fluid
reservoir. (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. Also inspect
jounce bumpers inside dust boot for signs of damage
or deterioration.

(5) Verify correct struts and coil springs are

installed on vehicle.

Coil springs are rated separately for each side of

vehicle depending on optional equipment and type of
service.

NOTE: If the coils springs require replacement, be
sure that the springs being replaced, are replaced
with springs meeting the correct load and spring
rate for the vehicle.

Replacement of the coil spring requires removal

and disassembly of the strut assembly. Refer to Strut
Assembly in the Removal and Installation section in
this group of the service manual for the required
removal and replacement procedure. Then, refer to
Strut Assembly in the Disassembly and Assembly
section in this group of the service manual for the
required procedure to disassemble and assemble the
shock absorber.

SPINDLE

The rear suspension spindle is not a repairable

component of the rear suspension, If it is determined
that the spindle is broken or bent when servicing the
vehicle, no attempt is to be made to repair or to
straighten the spindle. THE SPINDLE MUST BE
REPLACED IF FOUND TO BE DAMAGED IN
ANY WAY.

LATERAL LINKS

Inspect the lateral link isolator bushings and

sleeves for signs of damage or deterioration. If the
lateral link isolator bushings or sleeves are damaged
or are deteriorated, replacement of the lateral link
assembly will be required. The isolator bushings are
not serviceable as a separate component of the lat-
eral link assembly.

Inspect the lateral links for signs of contact with

the ground or road debris which has bent or caused
other damage to the lateral link assembly. If the lat-
eral link is bent or damaged, the lateral link will
require replacement. Do not attempt to repair or
straighten a lateral link.

TRAILING ARM

Inspect the trailing arm and trailing arm bushings

for signs of deterioration and or damage. If the trail-
ing arm bushings are deteriorated or the trailing arm
is damaged in any way, replacement of the trailing
arm will be required.

Fig. 2 Strut Assembly Inspection

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SUSPENSION

300M

DESCRIPTION AND OPERATION (Continued)

Inspect the trailing arm for signs of contact with

the ground or road debris which has bent or caused
other damage to the trailing arm. If the trailing arm
is bent or damaged the trailing arm will require
replacement.

not

attempt

repair

straighten a trailing arm.

STABILIZER BAR AND BUSHINGS

Inspect the stabilizer bar for damage or bending.

Inspect for broken or distorted stabilizer bar bush-
ings, bushing retainers, and worn or damaged stabi-
lizer bar to strut attaching links. If stabilizer bar to
rear frame rail bushing replacement is required,
bushings can be removed from sway bar by bending
back the tabs securing the retainer halves together,
removing the metal retainer halves, opening the
bushing slit, and peeling the bushing off sway bar.
On reassembly, bending the retainer tabs back into
place is optional, as long as the attaching bolts to the
frame rail are properly tightened.

STABILIZER BAR ATTACHING LINKS

Inspect the bushings and sleeves on the stabilizer

bar attaching links for damage or deterioration.
Inspect the lower ball stud for excessive looseness
and damage. Inspect the stabilizer bar attaching link
to ensure it is not bent or broken. If any of these con-
ditions are present when inspecting the attaching
links, replacement of the attaching link is required.

REMOVAL AND INSTALLATION

STRUT ASSEMBLY

REMOVE

NOTE: When removing rear strut assembly from
vehicle, access for the 3 rear strut assembly to
strut tower attaching nuts is through the passenger
compartment of the vehicle.

(1) Remove the rear seat cushion from the interior of

the car. Refer to Seats in the Body section of this man-
ual for the required procedure to be used for this vehicle.

(2) Remove the rear seat back assembly. Refer to

Seats in the Body section of this manual for the
required procedure to be used for this vehicle.

(3) Remove both upper quarter trim panels from

the rear of the vehicle interior. Refer to Body Compo-
nents in the Body section of this manual for the
required procedure to be used for this vehicle.

(4) Remove both lower quarter trim panels from

the rear of the vehicle interior. Refer to Body Compo-
nents in the Body section of this manual for the
required procedure to be used for this vehicle.

(5) Remove the rear parcel shelf trim panel from

the vehicle interior. Refer to Body Components in the
Body section of this manual for the required proce-
dure to be used for this vehicle.

Remove the 4 screws securing the rear speaker and

mounting plate in place for the side of the vehicle
requiring repair. The speaker should be removed
from the vehicle with the mounting plate
attached. Unplug the wiring from the speaker, then
remove the speaker and mounting plate from the
vehicle.

(6) Raise vehicle on jack stands or centered on a

frame contact type hoist. See Hoisting in the Lubri-
cation and Maintenance section of this manual for
the required lifting procedure to be used for this
vehicle.

(7) Remove the rear wheel and tire assembly from

the vehicle.

(8) Remove the rear caliper assembly from the

adapter. Refer to Rear Disc Brakes in Group 5
Brakes of this Service manual for required caliper
removal procedure. After removing the caliper assem-
bly, store the caliper by hanging it from the under-
side of the vehicle (Fig. 3). Do not let the rear caliper
assembly hang from flexible brake hose.

Fig. 3 Storing Rear Caliper Assembly

300M

SUSPENSION

2 - 41

DIAGNOSIS AND TESTING (Continued)

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