Chrysler Le Baron, Dodge Dynasty, Plymouth Acclaim. Manual — part 88
mount have been loosened for any reason, or if vehicle
has experienced front structural damage, driveshaft
lengths must be checked and corrected, if required. A
shorter than required driveshaft length can result in ob-
jectionable noise. A longer than required driveshaft
length may result in potential damage.
Use of the following procedure will ensure satisfac-
tory driveshaft engagement under all normal vehicle
operating conditions.
(1) The vehicle must be completely assembled.
Front wheels must be properly aligned and in the
straight ahead position. The vehicle must be in a po-
sition so that the full weight of the body is distrib-
uted to all four tires. A platform hoist, or front end
alignment rack, is recommended.
(2) Using a tape measure or other suitable measuring
device. Measure the direct distance from the inner edge
of the outboard boot to the inner edge of the inboard
boot on both driveshafts. This measurement must be
taken at the bottom (six o’clock position) of the drive-
shafts (Fig. 1).
Note that the required dimension varies with car-line,
engine, transaxle, and driveshaft manufacturer (Fig. 2).
(3) If the lengths of both shafts are within the
range specified, no further action is required.
If either left or right driveshaft length is not
within the specified range. Refer to Group 09, Engine
Removal and Installation to properly position engine
according to specified driveshaft lengths.
(4) If proper driveshaft lengths cannot be achieved
within the travel limits available in the slotted engine
mounts. Check for any condition that could effect the
side to side position of the measurement locations (e.g.,
engine support brackets, siderail alignment, etc.).
(5) After ensuring proper driveshaft lengths the
transmission shift linkage must be adjusted to en-
sure proper operation. Refer to Transaxle, Group 21.
Fig. 2 Driveshaft Identification and Dimensions
Fig. 19 Left Driveshaft with Damper Weight
Fig. 1 Driveshaft Positioning
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SUSPENSION AND DRIVESHAFTS
2 - 49
REAR SUSPENSION
INDEX
page
page
Coil Springs and Jounce Bumper
. . . . . . . . . . . . 51
General Information
. . . . . . . . . . . . . . . . . . . . . . . 50
Pivot Bushing AC AG AJ AP Body
. . . . . . . . . . . 55
Pivot Bushing AC and AY Body
. . . . . . . . . . . . . 52
Rear Axle Assembly
. . . . . . . . . . . . . . . . . . . . . . 57
Shock Absorbers
. . . . . . . . . . . . . . . . . . . . . . . . . 51
Track Bar-Brace-Bracket
. . . . . . . . . . . . . . . . . . . 52
GENERAL INFORMATION
All front wheel drive passenger cars. Utilize a
Trailing Arm Twist Beam type rear axle in conjunc-
tion with coil (or air) springs (Fig. 1). The blade type
Trailing Arms, attached to body mounted pivots, pro-
vide fore and aft location of the suspension while a
Track Bar provides lateral location.
Located in line with the spindles. An open channel
section beam axle assures that the rear tires remain
parallel to each other, and essentially perpendicular
Fig. 1 Trailing Arm Rear Suspension
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SUSPENSION AND DRIVESHAFTS
Ä
to the road surface. While being able to twist as one
wheel moves vertically with respect to the other.
Roll resistance is provided partly by the axle’s re-
sistance to twist. But primarily by a torque tube or
rod (depending on the suspension option called for)
running through the channel and attached rigidly to
its end plates by welding. Because the torque tube/
rod is an integral part of the axle assembly, it cannot
be individually replaced.
The spindles are bolted to the axle end (spindle
mounting) plates and can be individually replaced if
required. Rear wheel alignment changes require the
use of shims between the spindle and axle end plates.
SHOCK ABSORBERS
REMOVAL
(1) Raise vehicle, see Hoisting, Group 0.
(2) Support axle and remove wheel and tire assem-
bly.
(3) If equipped with air shocks, disconnect air
lines.
(4) Remove upper and lower shock absorber fasten-
ers, remove shock absorbers (Fig. 2).
INSPECTION
Inspect for evidence of fluid leakage from upper
end of reservoir. (Actual leakage will be a stream of
fluid running down and leaking off lower end). Slight
seepage is not unusual and will not effect perfor-
mance.
INSTALLATION
(1) Position shock absorber on car. Install upper
and lower fasteners loosely to hold shock absorber in
place.
(2) Tighten upper fastener to 61 N
Im (45 ft. lbs.)
torque. Connect air line, if so equipped.
(3) Install wheel and tire assembly, tighten wheel
stud nuts to 129 N
Im (95 ft. lbs.) torque. Lower vehi-
cle to ground.
(4) With suspension supporting the weight of the
vehicle. Tighten lower shock absorber fastener to 54
N
Im (40 ft. lbs.) torque.
COIL SPRINGS AND JOUNCE BUMPER
REMOVAL
(1) Lift vehicle see hoisting Group 0.
(2) Support axle assembly and remove both lower
shock absorber attaching bolts.
(3) Lower axle assembly until spring and spring
upper isolator can be removed (Fig. 3). Do not
stretch brake hose.
(4) Remove two screws holding cup to rail (Fig. 1).
Remove assembly.
INSTALLATION
(1) Position cup to rail. Install and tighten attach-
ing bolts to 8 N
Im (70 in. lbs.) torque.
(2) Install isolator over jounce bumper and install
spring.
(3) Raise axle and loosely assemble both shock ab-
sorber to axle mounting bolts. Remove axle support
and lower vehicle.
(4) With suspension supporting the weight of the
vehicle. Tighten both shock absorber attaching bolts
to 61 N
Im (45 ft. lbs.) torque.
Fig. 2 Remove/Install Shock Absorber Fasteners
Fig. 3 Coil Spring & Jounce Bumper
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SUSPENSION AND DRIVESHAFTS
2 - 51
TRACK BAR-BRACE-BRACKET (FIG. 4)
REMOVAL
(1) Raise vehicle, see Hoisting, Group 0.
(2) Raise rear axle to curb height, with jack stands
(Fig. 5).
(3) Remove track bar-to-axle pivot bolt. And re-
move track bar-to-frame pivot bolt. Remove track
bar.
(4) Remove diagonal brace-to-underbody stud nut.
Remove diagonal brace.
(5) Remove two track bar bracket-to-frame rail
bolts. Remove bracket.
INSTALLATION
(1) Position support bracket on frame rail, install
and tighten (2) bolts to 54 N
Im (40 ft. lbs.) torque.
(2) Fit diagonal brace into support bracket and
over underbody stud, tighten stud nut to 75 N
Im (55
ft. lbs.) torque.
(3) Fit track bar to diagonal brace, loose assemble
pivot bolt with nut and washer on rear side. Attach
the other end of track bar to bracket on axle and
tighten to 95 N
Im (70 ft. lbs.) torque. Tighten nut on
track bar-to-frame bolt to 75 N
Im (55 ft. lbs.) torque.
PIVOT BUSHING AC AND AY BODY
REMOVE FROM VEHICLE
(1) Raise vehicle (see Hoisting, Group 0). Remove
brake hose mounting bracket screw (Fig. 5).
(2) Detach park brake cable at connector and from
hanger bracket (Fig. 5).
Fig. 4 Track Bar Brace Bracket
Fig. 5 Remove Brake Hose Mounting Bracket Screw
and Park Brake Cable
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SUSPENSION AND DRIVESHAFTS
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