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SECTION 2D

REAR SUSPENSION

SPECIFICATIONS

Fastener Tightening Specifications

Application
N•m
Lb-Ft
Shock Absorber-to-Body Bolts (upper)
50
37
Shock Absorber-to-Axle Bolt (Lower)
72
53
Shock Absorber Piston Rod Nut
20
15
Rear Axle Mounting Bolt
115
85
Rear Axle Mounting Bracket Bolt
70
52
Rear Wheel Bearing Spindle to Axle Fixing Nut
80
59
Rear Hub Caulking Nut
190
140

CONPONENT LOCATOR

Rear Suspension


T3B12D23
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  1. Rear axle
  2. Spring upper Insulator
  3. Coil spring
  4. Spring lower Insulator
  5. Shock absorber
  6. Shock absorber upper bolt
  7. Shock absorber lower bolt
  8. Wheel bearing spindle
  9. Caulking nut
  10. Spindle cap
  11. Brake drum

SPECIAL TOOLS

Special Tools Table


KM266A
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KM-266-A
Remover

J2147418
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J-21474-18
Nut

J2147419
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J-21474-19
Puller Bolt/Thrust Washer

J29376A
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J-29376-A, Rear Control Arm Bushing Service
Set. Includes:
  • J-29376-6A Rear Control Arm Bushing Remover/Installer
  • J-29376-7 Rear Control Arm Bushing Plate
  • J-29376-A Rear Control Arm Bushing Housing

J36791
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J-36791
Installer

DIAGNOSIS

Excessive Friction Test

Check excessive friction in the rear suspension as follows:
  1. With the aid of a helper, lift up on the rear bumper and raise the vehicle as high as possible. Slowly release the bumper and allow the car to assume normal trim height.
  2. Measure the distance from the floor to the center of the bumper.
  3. Push down on the bumper, release slowly, and allow the car to assume normal trim height.
  4. Measure the distance from the floor to the center of the bumper.
The difference between the two measurements should be less than 12.7 mm (0.50 inch). If the difference exceeds this limit, inspect the control arms for damage or wear.

MAINTENANCE AND REPAIR

ON-VEHICLE SERVICE



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Shock Absorber

Removal Procedure

    Notice : Remove only one shock at a time when both shocks are being replaced. Suspending the rear axle at full length can result in damage to brake lines and hoses.

  1. Remove the shock absorber-to-body bolts (upper).


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    Important : When lifting the vehicle with a body hoist, it will be necessary to support the rear axle with adjustable jack stands.

  3. Raise the vehicle and support the rear axle assembly.
  4. Remove the lower shock absorber-to-axle bolt. Remove the shock absorber.


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Installation Procedure

    Important : It will be necessary to bring the axle assembly to trim height prior to tightening the shock absorber attachment bolts.

  1. Insert the lower shock absorber-to-axle bolt through the shock absorber lower attachment bracket and into the axle.
  2. Lower the vehicle enough to guide the upper shock stud on the body opening and loosely install the attaching bolts.
  3. Tighten
    Tighten the lower shock absorber-to-axle bolt to 72 N•m (53 lb-ft) and upper shock absorber-to-body bolt to 50 N•m (37 lb-ft).



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Springs and Insulators

Caution : When removing the rear springs, do not use a twin-post type hoist. The tendency of the rear axle assembly to swing when certain fasteners are removed may cause it to slip from the hoist. This may result in personal injury. Perform the operation on the floor if necessary.

Removal Procedure

  1. Raise and suitably support the vehicle. Use a frame contact hoist if possible and support the rear control arms with jack stands. If it becomes necessary to lift the vehicle with a twin-post hoist, lift the body and support the control arms with jack stands.
  2. Remove the wheel. Refer to Section 2E, Tires and Wheels.
  3. Remove the right and the left shock absorber bolts. Refer to "Shock Absorber" in this section.
  4. Lower the rear axle and remove the springs and the top insulator.


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Installation Procedure

    Important : Prior to installing the springs, it will be necessary to install the upper insulators to the body with adhesive to keep them in position while raising the axle assembly and the springs.

  1. Install the upper insulator and seat the lower bumper.


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  3. Install the springs and raise the axle.
  4. Install the shock absorbers. Refer to "Shock Absorber" in this section.
  5. Important : It will be necessary to bring the axle assembly to trim height prior to tightening the shock absorber attachment bolts.

  6. Install the wheel. Refer to Section 2E, Tires and Wheels.
  7. Remove the jack stands and lower the vehicle.


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Rear Axle Assembly

Removal Procedure

  1. Raise and suitably support the vehicle.
  2. Remove the rear wheels. Refer to Section 2E, Tires and Wheels.
  3. Disconnect the parking brake. Refer to SectIon 4G, Parking Brake.
  4. Disconnect the ABS sensor line.


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  6. Disconnect the brake pipes from the brake hoses at the rear axle brackets by removing the cap screws and the retaining clip. Cap or tape the brake hose openings to prevent entry of foreign matter. Unclip the brake hose from the rear axle brackets. Refer to Section 4E, Rear Drum Brakes.
  7. Place support jacks under the arms of the rear axle and raise the rear axle arms slightly. Remove the shock absorbers. Refer to "Shock Absorbers" in this section.
  8. Remove the shock absorbers. Refer to “Shock Absorbers” in this section.
  9. Lower the support jacks and remove the rear springs. Refer to "Springs and Insulators" in this section.
  10. Remove the rear axle mounting bolts (left) and the rear axle mounting bracket bolts (right) from the underbody. Pry the rear axle slightly with a screwdriver, if required.
  11. Remove the rear axle.


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Installation Procedure

  1. Raise the rear axle and loosely fasten it to the vehicle underbody mountings with the rear axle-to-body bracket bolt.
  2. Install the rear springs and insulators. Refer to "Springs and Insulators" in this section.
  3. Raise the rear axle arm with the support jacks. Attach the shock absorber to the axle with the lower attachment bolt. Refer to "Shock Absorbers" in this section.
  4. Connect the brake pressure hoses into the bracket on the rear axle. Mount the retaining clips. Connect the brake pipes to the brake hoses. Bleed the brakes. Refer to Section 4E, Rear Drum Brakes.
  5. Install the parking brake. Refer to SectIon 4G, Parking Brake.


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  7. Lower the vehicle slightly and install the rear wheels. Refer to Section 2E, Tires and Wheels.
  8. At curb height, tighten the rear axle-to-body bracket bolt (left)and the rear axle mounting bracket bolts (right).
  9. Tighten
    Tighten the rear axle-to-body bracket bolt to 115 N•m (85 lb-ft) and the rear axle mounting bracket bolts to 70 N•m (52 lb-ft)

  10. Adjust the rear wheel brakes. Bleed the brake system and check for leaks. Refer to Section 4E, Rear Drum Brakes.


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  12. Connect the ABS sensor line.
  13. Adjust the parking brake. Refer to SectIon 4G, Parking Brake.
  14. Lower the vehicle completely.nuts


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Wheel Bearing Spindle

Removal Procedure

  1. Raise and suitably support the vehicle.
  2. Remove the wheel. Refer to Section 2E, Tires and Wheels.
  3. Notice : Do not hammer on the brake drum. Damage to the bearing could result.

  4. Remove the brake drum. Refer to Section 4E, Rear Drum Brakes.
  5. Loosen the parking brake cable. Refer to Section 4G, Parking Brake.
  6. Disconnect the ABS sensor line, if equipped ABS.


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  8. Remove the wheel bearing spindle. The hub bearing assembly is fixed in the brake drum and not removable.


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Installation Procedure

    Notice : The hub bearing assembly is not to be serviced separately from the drum. The drum assembly must be replaced.

  1. Install the wheel bearing spindle with the nuts.
  2. Tighten
    Tighten the wheel bearing spindle nuts to 80 N•m (59 lb-ft).



    T3B12D17
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  3. Connect the ABS sensor line.
  4. Install the brake drum and tighten the brake detent screw. Refer to Section 4E, Rear Drum Brakes.
  5. Install the rear hub caulking nut.
  6. Tighten
    Tighten the rear hub caulking nut to 190 N•m (140 lb-ft).

  7. Mount the rear wheel. Refer to Section 2E, Tires and Wheels.
  8. Adjust the parking brake. Refer to Section 4G, Parking Brake.
  9. Lower the vehicle.

UNIT REPAIR



T3B12D19
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Control Arm Bushings

Tools Required

KM-266-A Remover
J-21474-18 Nut
J-21474-19 Puller Bolt/Thrust Washer
J-29376-A Control Arm Bushing Housing
J-29376-6A Rear Control Arm Bushing Remover/Installer
J-29376-7 Rear Control Arm Bushing Plate

Disassembly Procedure

  1. Raise and suitably support the vehicle.
  2. Remove the rear axle and secure it to a workbench. Refer to "Rear Axle Assembly" in this section
  3. Notice : To facilitate removal of damping bushings, warm the rear axle in the area of the bushings to approximately 50 to 75°C (122 to 158°F) using an industrial hot air dryer.

  4. Place the control arm bushing housing J-29376-A on the rear axle. Slide the puller bolt/thrust washer J-21474-19 through the control arm bushing remover/ installer J-29376-6A, the rear control arm bushing, the control arm bushing plate J-29376-7 and into the nut J-21474-18.
  5. Partially remove the rear axle bushing by turning the nut J-21474-18 and counterholding the puller bolt J-21474-19.


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  7. Remove the rear axle bushing completely by striking the control arm bushing remover/installer J-29376-6A with the remover KM-266-A.


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Assembly Procedure

  1. Place the control arm bushing housing J-29376-A on the rear axle. Slide the puller bolt J-21474-19 through the thrust washer J-1474-19, the control arm bushing plate J-29376-7, the rear control arm bushing, the control arm bushing remover/installer J-29376-6A and into the nut J-21474-18.
  2. Install the rear axle bushing by turning the nut J-21474-18 and counterholding the puller bolt J-21474-19.


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  4. Be sure the bushing angle is 40 to 50 degrees to the axis of the rear axle.
  5. Install the rear axle. Refer to "Rear Axle Assembly" in this section
  6. Lower the vehicle.

Rear Axle Without ABS

Disassembly Procedure

  1. Remove the rear axle. Refer to "Rear Axle Assembly" in this section.
  2. Remove the hub and bearing assembly. Remove the spindle from the rear axle. Refer to "Hub and Bearing Assembly Without ABS" in this section.
  3. Remove the rear brake assembly. Refer to Section 4E, Rear Drum Brakes.
  4. Remove the stabilizer shaft. Refer to "Stabilizer" in this section.
  5. Remove the rear control arm bushings. Refer to "Control Arm Bushings" in this section.

Assembly Procedure

  1. Install the rear control arm bushings. Refer to "Control Arm Bushings" in this section.
  2. Install the stabilizer shaft. Refer to "Stabilizer" in this section.
  3. Install the rear brake assembly. Refer to Section 4E, Rear Drum Brakes.
  4. Thinly coat the wheel spindle with antifriction bearing grease in the area of the brake anchor plate. Install the spindle and the hub and bearing assembly. Refer to "Hub and Bearing Assembly Without ABS" in this section.
  5. Install the rear axle. Refer to "Rear Axle Assembly" in this section.
  6. Adjust the wheel bearing. Refer to "Wheel Bearing Adjustment" in this section.

Rear Axle with ABS

Disassembly Procedure

  1. Remove the rear axle. Refer to "Rear Axle Assembly" in this section.
  2. Remove the hub and bearing assembly. Refer to "Hub and Bearing Assembly Without ABS" in this section.
  3. Remove the rear brake assembly. Refer to Section 4E, Rear Drum Brakes.
  4. Remove the stabilizer shaft. Refer to "Stabilizer" in this section.
  5. Remove the rear control arm bushings. Refer to "Control Arm Bushings" in this section.

Assembly Procedure

  1. Install the rear control arm bushings. Refer to "Control Arm Bushings" in this section.
  2. Insert the stabilizer shaft into new rear axle and screw the shaft into place. Refer to "Stabilizer" in this section.
  3. Install the rear brake assembly. Refer to Section 4E, Rear Drum Brakes.
  4. Install the hub and bearing assembly. Refer to "Hub and Bearing Assembly Without ABS" in this section.
  5. Install the rear axle. Refer to "Rear Axle Assembly with ABS" in this section.

GENERAL DESCRIPTION AND SYSTEM OPERATION

Rear Suspension

General Description

The rear suspension consists of an axle with trailing arms and a twisting cross beam, two coil springs, two shock absorbers, two upper spring insulators, and two spring compression bumper. The axle support assembly attaches to the underbody through a rubber bushing located at the front of each of the control arms. The brackets are integral with the underbody side rails. The axle structure maintains the relationship of the wheels to the body. A serviceable stabilizer shaft, incorporated with the axle beam, attaches to each of the control arms.
Each coil spring is retained between a seat in the underbody and a seat welded to the top of the rear axle control arm. The coil spring lower end rests on a compression bumper in the welded bracket on top of the rear axle, while a rubber insulator is used to isolate the coil spring upper end from the vehicle underbody seat.


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