FRONT SUSPENSION 3-9
Inspection
1.
Check bearings for cracked separators or worn or
pitted rollers and races.
2.
Check brake drum for
out-of-
round or scoring.
3.
Check fit of bearing outer cups in hub.
Repairs
Replacement of Bearing Cups
1.
Using steel bar stock, make press-out tools shown in
Figure 11.
2.
Insert removers through hub, indexing ends into slots
in hub shoulder behind bearing cup.
3.
Using a suitable extension pipe or rod, press bearing
cups from hub.
4.
Install new bearing cup in hub using Tool J-8849 on
the outer and Tool J-8850 on the inner cup (fig. 12).
Use Driver Handle J-8092 with the installers. Make
sure that the bearing cups are not cocked and are
fully seated against shoulder in hub.
Installation
1.
Pack both inner and. outer bearings using a high
melting point wheel bearing lubricant.
2.
Place inner bearing in hub, then install a new inner
bearing lip seal assembly. Seal flange should face
bearing cup.
3.
Carefully install wheel hub over steering spindle.
4.
Install outer bearing, pressing it firmly into the hub
by hand.
5.
Install spindle washer and adjusting nut. Draw up
tight and adjust wheel bearings as outlined under
"Front Wheel Bearing Adjustment".
STEERING KNUCKLE
Chevrolet, Chevelle, Camaro and Corvette—It is rec-
ommended that vehicle be raised and supported on a
twin-post hoist so that the front coil spring remains com-
pressed, yet the wheel and steering knuckle assembly re-
main accessible. If a frame hoist is used, support lower
control arm with an adjustable jackstand to safely retain
spring in its curb height position.
Chevy n— While vehicle weight is still on front wheels,
position support between upper control arm and frame
side rail (fig. 13), then raise vehicle and position adjust-
able jackstand under lower control arm.
Removal
1.
Raise vehicle and support lower control arm as noted
above.
2.
Remove hub cap, wheel hub dust cover, cotter pin,
adjusting nut and washer. Withdraw wheel and tire,
brake drum, (or, on Corvette--brake caliper and disc
and hub assembly, See Section 5) and wheel hub and
bearing assembly from steering knuckle spindle.
3.
Remove brake shoes from backing plate (except
Corvette, See Section 5) and clamp wheel cylinder.
CAUTION: Keep brake shoes clean and dry.
4.
Remove brake anchor pin and two bolts securing
brake backing plate and steering arm to steering
knuckle.
5.
Withdraw steering arm and brake backing plate from
steering knuckle. Wire backing plate to frame (fig.
13).
Do not disconnect brake line.
NOTE: Refer to Section 9 - Steering Linkage -
Tie Rod, for further steering arm service
operations.
6. Remove upper and lower ball stud cotter pins and re-
move ball stud nuts. Free steering knuckle from
ball studs by rapping steering knuckle bosses. With-
draw steering knuckle.
Installation
1.
Place steering knuckle in position and insert upper
and lower ball studs into knuckle bosses.
2.
Install ball stud nuts and tighten nut as shown in the
specifications at the end of this section.
Fig.
12 - Installing Front Hub Inner Bearing
Fig.
13 - Backing Plate Removed - Chevy II
CHEVROLET CHASSIS SERVICE MANUAL
SECTION
4
REAR SUSPENSION
AND
DRIVE LINE
CONTENTS
OF
THIS SECTION
Page
Rear Suspension
4-1
Drive Line.
. 4-26
Rear Axle ......
4-26
Propeller Shaft
and
Universal Joints
Special Tools
4-37
4-43
REAR SUSPENSION
INDEX
General Description
4-1
Chevrolet
4-1
Chevelle
4-1
Chevy
n and
Camaro
. . . . . 4-2
Corvette
. . . . . . 4-3
Maintenance
and
Adjustments ...............
4-4
Riding Height Check (Chevrolet, Camaro,
Chevelle
and
Chevy
II) 4-5
Wheel Alignment (Corvette)
4-5
Wheel Bearing Adjustment (Corvette)
4-6
Component Parts Replacement (Chevrolet, Camaro,
Chevelle
and
Chevy
JJ) 4-7
Coil Spring
4-7
Chevrolet
4-7
Removal
4-7
Installation
4-7
Chevelle
4-8
Removal
4-8
4-8
Installation
.
Leaf Spring, Spring Seat Pads, Spring
Eye
Bushings
4-9
Chevy
H 4-9
Removal
4-9
Installation
4-9
Camaro
4-10
Removal
4-10
Installation
4-11
Shock Absorber
4-11
Chevrolet
and
Chevelle
. 4-11
Removal
4-11
Installation
. . 4-12
Chevy
II 4-12
Removal
4-12
Installation
4-rl2
Camaro
4-12
Removal
. 4-12
Installation
4-12
Control
Arm . . 4-12
Chevrolet Upper
4-12
Removal
. 4-12
Page
Bushing Replacement
. 4-13
Installation
4-14
Chevrolet Lower
4-14
Removal
4-14
Bushing Replacement
4-14
Installation
. 4-15
Chevelle Upper
and
Lower.
. 4-15
Removal
4-15
Bushing Replacement
4-15
Installation
4-17
Rear Suspension
Tie Rod
(Chevrolet)
. . .
......
. . . 4-17
Removal
4-17
Bushing Replacement
4-17
Installation
4-17
Component Parts Replacement (Corvette)
. . 4-17
Wheel Spindle
and
Support
4-17
Removal
4-17
Repairs
', . 4-17
Installation
4-18
Differential Carrier Support Bracket Replacement.
. 4-20
Shock Absorber
4-20
Removal
4-20
Installation
* .... 4-20
Strut
Rod and
Bracket
4-20
Removal
4-20
Repairs
4-21
Installation
4-21
Spring
4-21
Removal
4-21
Repairs
4-22
Installation
4-22
Torque Control
Arm 4-23
Removal
4-23
Repairs
. 4-23
Installation
4-24
Suspension Crossmember
4-24
Removal
4-24
Repairs—Isolation Mount
4-25
Installation
4-25
Stabilizer Shaft Replacement
4-25
GENERAL DESCRIPTION
CHEVROLET
The link type rear suspension (fig. 1) has two lower
control arms which maintain proper axle to frame re-
lationship and also take the acceleration, drive and
braking forces. A single upper control arm on light-
duty models (or two upper control arms on heavy-duty
models and all station wagons) limits axle rotation when
drive, acceleration or braking forces are applied. Lateral
movement of the axle is restricted by the axle-to-frame
tie rod. Two full coil springs and two direct, double
acting shock absorbers are provided for additional ride
control.
CHEVELLE
The rear suspension (fig. 2) is of the four-link design
utilizing axle mounted, full coil springs and direct,
double-acting shock absorbers.
Two rubber-bushed lower control arms, stretching
slightly outboard from axle-mounted brackets to frame
side member mounted brackets, maintain fore and aft
CHEVROLET CHASSIS SERVICE MANUAL
REAR SUSPENSION AND DRIVE LINE 4-11
lower cushion
correct.
will be aligned if installation is
Fig.
25—Installing Spring Front Bushing (Camaro)
Unnecessary torque applied after flange is
seated will tend to distort flange and reposition
bushing in spring.
i. Disassemble bushing installation tools and re-
move from spring.
8. Pry parking brake cable out of the retainer bracket
mounted on the spring mounting plate.
9. Remove spring bracket-to-axle bracket retaining
nuts,
remove upper and lower rubber spring pads
and bracket.
10.
Support spring, then remove lower bolt from spring
rear shackle. Separate shackle and withdraw spring
from vehicle.
11.
Remove rear spring shackle upper bolt and withdraw
shackle bushings from frame.
Installation
1.
Position spring front mounting bracket to spring
front eye. Spring attaching bolt must be installed
so that head of bolt is toward center of vehicle.
2.
Position spring shackle upper bushings in frame,
position shackles to bushings and loosely install
bolt and nut.
3.
Install bushing halves in spring rear eye, place
spring to shackles and loosely install shackle lower
bolt and nut.
NOTE: When installing spring, make sure
spring is positioned so that parking brake cable
is on underside of spring.
4.
Raise front end of spring and position bracket to
underbody. Guide spring into position so that it will
index in the axle bracket and also make sure that
the tab on spring bracket is indexed in slot pro-
vided in the underbody.
5.
Loosely install spring-to-underbody bracket.
6. Position spring upper cushion between spring and
axle bracket so that spring cushion ribs align with
axle bracket locating ribs.
7.
Place lower spring cushion on spring so that .cushion
is indexed on locating dowel. Upper cushion and
8. Place lower mounting plate over locating dowel on
spring lower pad and loosely install retaining nuts.
9. If new mounting plate was installed, transfer parking
brake cable retaining bracket to new plate.
10.
Position shock absorber to spring mounting plate and
loosely install eye bolt and nut - head of bolt should
be toward front of vehicle.
11.
Position parking brake cable in retaining bracket and
securely clamp bracket to retain cable.
12.
Remove stand jacks and lower vehicle so that weight
of vehicle rests on suspension components. Torque
all affected parts to specifications.
SHOCK ABSORBER
Chevrolet and Chevelle
Removal
1.
Raise rear of vehicle and support rear axle
assembly.
If equipped with superlift shock absorber, disconnect
air line from shock absorber.
Disconnect shock absorber at upper mounting bracket
by removing the two retaining bolts. Refer to Figure
26 for shock absorber mounting details. (Chevelle
components shown as typical.)
Disconnect shock absorber at lower attaching bracket
and remove shock.
NOTE: When performing any service opera-
tions that requires removal or loosening of the
lower attaching nut, it is essential that the stud
be prevented from turning. A hex is located on
the stud between the axle bracket and shock
absorber in order that a wrench may be used
for this purpose. Failure to hold the stud in
this manner will result in damage to the mer
chanical bond between the shock absorber bush-
ing and the mounting stud.
2.
3.
STATION WAGON AND PICKUP
Fig.
26—Shock Absorber Mounting—Exploded View
(Chevelle)
CHEVROLET CHASSIS SERVICE MANUAL
REAR SUSPENSION AND DRIVE LINE 4-12
Fig.
27—Shock Absorber Mounting—Exploded View (Chevy II)
Installation
1.
Loosely install the two shock absorber upper at-
taching bolts.
2.
Position lower attaching stud in axle bracket and
loosely install lock washer and nut.
3.
Torque upper attaching bolts to specifications.
4.
Torque lower attaching nut to specifications, ob-
serving procedure outlined in Removal procedure.
5.
If equipped with superlift shock absorbers, connect
air line to shock absorber and add air to obtain a
minimum of 10 psi.
6. Lower vehicle and check shock absorber action.
Fig.
28—Removing Shock Absorber Eye Bolt (Chevy II)
Chevy H
Removal (Refer to Fig. 27)
1.
Raise vehicle and support axle housing with adjust-
able jackstand.
2.
Loosen and remove shock absorber lower mounting
bolt from shock absorber eye (fig. 28).
3.
Remove shock absorber upper mounting bracket
bolts and withdraw shock absorber and bracket.
4.
Remove nut, washers, bushing and upper mounting
bracket from shock absorber. Inspect rubber bush-
ings for aging or damage and replace where
necessary.
Installation
1.
Assemble nut, washer, rubber bushings, bracket and
upper bushing to shock absorber. Torque nut to
specifications.
2.
Install shock absorber with upper bracket to floor
pan and torque to specifications.
3.
Insert shock absorber eye into lower bracket, install
bolt with nut to rear and torque to specifications.
4.
Lower vehicle and test shock absorber action.
Comoro
Removal (Refer to Fig. 29)
1.
Raise rear of vehicle and support rear axle
assembly.
2.
Loosen and remove shock absorber lower attaching
bolt from shock absorber eye.
3.
Remove shock absorber upper mounting bracket-to-
iiinderbody retaining screws and withdraw shock ab-
sorber and bracket.
4.
Remove nut, upper retainer and grommet, gasket
and bracket, and lower grommet and retainer from
the shock absorber rod.
5.
Inspect rubber grommets and gasket for damage and
deterioration--replace as required.
Installation
1.
Assemble lower retainer and grommet, bracket and
gasket, upper grommet and retainer and nut to the
shock absorber rod. Torque nut to specifications.
2.
Position shock absorber bracket to underbody and
install bracket retaining screws. Torque retaining
screws to specifications.
3.
Insert shock absorber eye into lower bracket, install
bolt with head toward front of vehicle. Torque nut to
specifications.
4.
Lower vehicle and test shock absorber action.
CONTROL ARM
Chevrolet Upper
Removal
1.
*
Using,a suitable hoist that will support the rear axle
housing or wheels (such as a twin post or drive on
ramp type), remove the rear pivot bushing bolt at
the rear axle housing (fig. 30).
NOTE: The rear axle must be supported in
such a way as to prevent the axle housing from
rotating about the lower control arm rear pivot,
and to also relieve load on the pivot bushing.
2.
Remove the three bolts, lock washers and nuts at-
taching the upper control arm bracket to the
CHEVROLET CHASSIS SERVICE MANUAL
REAR SUSPENSION AND DRIVE LINE 4-18
ig.
44—Rear Suspension Tie Rod Attaching Points (Chevrolet)
Bushing
Replacement
The following bushing removal procedure is effective
for both ends of the tie rod used on station wagons and
the left end of the tie rod used on all models except
station wagons.
1,
With tie rod bushing centered over Tool J-7877-2
and with tie rod supported horizontally, press or
drive bushing from rod, using Tools J-7877-1 and
J-7079-2 as shown in Figure 45.
2.
With tie rod centered over Tool J-7877-2 and rod
supported horizontally, press or drive bushing into
arm using Tools J-7877-3 and J-7079-2 as shown
in Figure 45. Tool J-7877-3 should bottom on tie
rod when bushing is fully installed.
fig.
45—Tie Rod Bushing Replacement (Chevrolet)
Installation
1.
Mount the tie rod to the axle bracket stud. Install
nut and special washer but do not tighten.
NOTE:
On the tie rod used on all models except
station wagons, place flanged portion of bushing
against attaching bracket.
2.
Install the bolt, lock washer and nut to the frame
bracket (fig. 44). Do not tighten.
NOTE:
Bolt may be installed from either
direction.
3.
Lower vehicle to floor (if raised) and bounce rear
end several times to settle bushings. Tighten af-
fected parts to specifications.
COMPONENT PARTS REPLACEMENT (CORVETTE)
WHEEL SPINDLE AND SUPPORT (Fig. 46)
Removal
Hemdve wheel drive spindle as outlined previously in
this section under "Wheel Bearing Adjustment".
Repairs
Out of 3/8" square steel bar stock, make bearing
removers and use as shown in Figure 47.
After removing deflector, spindle inner grease seal
and inner bearing race, bearing cups may be re-
moved while spindle support is still mounted to the
torque arm, by inserting remover tool and tapping
cup out. New bearing cups are installed using Tool
J-7817 cup installer and handle J-8092 (fig. 48).
To remove spindle support from torque arm, pro-
ceed as follows.
a. Disconnect parking brake cable from actuating
lever.
b.
Remove four nuts securing support to torque arm
and withdraw brake backing plate and position it
out of the way.
c. Disconnect shock absorber lower eye from strut
rod mounting shaft. It may be necessary to sup-
port spring outer end before disconnecting shock
absorber, as shock absorber has internal rebound
control.
d. Remove cotter pin and nut from strut rod mount-
ing shaft, then pull shaft from support and strut
rod.
e. Spindle support may then be removed and bearing
cups serviced as in Step 2 above.
4.
To remove drive spindle outer bearing and seal
proceed as follows.
a. Position Tool J-8331 between chamfered edge of
bearing seat and inner race of bearing (fig. 49).
Clamp Tool J-8331 in a vise and apply pressure
to unseat bearing.
CAUTION: Use extreme caution when position-
ing Tool J-8331 against machined surface of
spindle. Make sure all tool imperfections such
as nicks and burrs are removed from spindle
contact area before applying pressure to unseat
bearing.
b.
Position Tool J-8331 and spindle in an arbor
press and press bearing from spindle (fig. 50).
c. Remove outer seal and inspect for damage--re-
place if necessary. Outer seal must be placed on
spindle before outer bearing inner race and roller
CHEVROLET CHASSIS SERVICE MANUAL
REAR SUSPENSION AND DRIVE LINE 4-21
Fig.
54—Marking Camber Cam and Bracket (Corvette)
bracket, so they may be reassembled in same loca-
tion (fig. 54).
5.
Loosen camber bolt and nut. Remove four bolts se-
curing strut rod bracket to carrier and lower
bracket.
6. Remove cam bolt nut and cam and bolt assembly.
Pull strut down out of bracket and remove bushing
caps.
7.
Inspect strut rod bushings for wear and replace
where necessary. Replace strut rod if it is bent or
damaged in any way.
Repairs
1.
With strut rod bushing centered over Tool J-7877-2
and with strut rod supported horizontally, press or
drive bushing from rod, using Tools J-7877-i and
J-7079-2 as shown in Figure 55.
2.
With strut rod end centered over Tool J-7877-2 and
rod supported horizontally, press or drive bushing
into arm using Tools J-7877-3 and J-7079-2 as
shown in Figure 55. Tool J-7877-3 should bottom
on strut rod when bushing is fully installed.
Installation
1.
Place bushing caps over inboard bushing and slide
rod into bracket. Install cam and bolt assembly and
adjust cam to line up with mark on bracket. Tighten
nut but do not torque at this point.
SPRING
LINK BOLT
SPRING
CUSHION
SPRING
CUSHION
CENTER
CLAMP
PLATE
J-7877-3
J-7877-1
STRUT ROD 11 s* ^#3 STRUT ROD
BUSHING
Fig.
56—Spring Mounting (Corvette)
2.
Raise bracket and assemble to carrier lower mount-
ing surface. Torque bolts to specifications.
3.
Raise outboard end of strut rod into spindle support
fork and insert strut rod shaft into fork so that flat
on shaft lines up with corresponding flat in spindle
fork. Install retaining nut, but do not torque.
4.
Place shock absorber lower eye and bushing over
strut shaft, install washer and nut and torque to
specifications.
5.
Lower vehicle to floor and torque camber cam nut
and strut rod shaft nut to specifications. Then in-
stall cotter pin through rod bolt.
6. Check rear wheel camber and adjust where
necessary.
SPRING (Fig. 56)
Removal
1.
Raise rear of vehicle and support on frame slightly
forward of torque control arm pivot points. Remove
wheels and tires.
Fig.
55—Strut Rod Bushing Replacement
Fig.
57—Chain Installation (Corvette)
CHEVROLET CHASSIS SERVICE MANUAL
REAR SUSPENSION AND DRIVE LINE 4-22
Fig.
58—Removing Clamp Plate (Corvette)
2.
Place floor jack under spring at link bolt, and raise
spring until nearly flat.
3.
Wrap 1/4", or 5/16" chain with grab hook around
suspension crossmember and spring and hook chain
securely with grab hook. Secure chain to spring with
C ela rnp to prevent slipping (fig. 57).
CAUTION: Use 1/4" or 5/16" chain only with
a sate grab hoo^for this operation. Do not use
rope,
wiro, cable .or other method of retaining
spring.
4.
Lower jack to free link bolt and remove link bolt
cotter pin, nut and rubber cushions.
Fig.
60—Removing Center Boit (Corvette)
5.
Support and raise spring end as in Step 2 above,
remove chain when loose.
6. Carefully lower jack until spring tension is com-
pletely released.
7.
Repeat Steps 2-6 on other side.
8. Remove four bolts and washers securing spring
center clamp plate (fig. 58).
9. Drop spring and slide out from under vehicle (fig.
59).
Repairs
•1.
Clamp spring center section in vise and remove
. center bolt (fig. 60).
2.
Release vise, remove spring and separate leaves.
3.
Replace worn or damaged liners as necessary and
replace any broken leaves.
4.
Replace main leaf spring cushion retainers by
chiseling over flared portion until retainer may be
knocked out of
leaf.
Place new retainers into posi-
tion and flare over with a ball peen hammer or other
suitable tool.
5.
Insert drift into center bolt holes in leaves to align
spring leaves (fig. 61). Install center bolt and tighten
securely.
installation
1.
Place spring on carrier cover mounting surface,
indexing center bolthead with hole in cover.
Fig.
59—Lowering Spring (Corvette)
Fig.
61—-Aligning Spring Leaves (Corvette)
CHEVROLET CHASSIS SERVICE MANUAL
REAR SUSPENSION AND DRIVE LINE 4-23
Fig.
62—Torque Control Arm (Corvette)
2.
Place center clamp plate in position and install four
bolts and washers. Tighten bolts and torque to
specifications.
3.
Raise spring outer end with floor jack until spring
is nearly flat and secure with chain as in Step 3-
Removal.
.4.
Lower jack, align torque control arm with spring
end and insert link bolt, rubber cushions and re-
tainers. Install castellated nut on link bolt and
tighten until cotter pin hole in bolt is visible. In-
sert new cotter pin and bend ends around.
5. Raise spring end with jack under link bolt, and re-
move chain and C clamp when loose.
6. Carefully lower jack, making sure rubber cushions
remain indexed in retainers.
7. Remove jack and repeat on opposite side. Install
wheels and tires, remove frame supports and lower
vehicle to floor.
TORQUE CONTROL ARM (Fig. 62)
Removal
1.
Disconnect spring on side torque arm is to be re-
moved. Follow Steps 1-6, Spring-Removal.
NOTE:
If vehicle is so equipped, disconnect
stabilizer rod from torque arm - refer to
"Stabilizer Rod Replacement".
2.
Remove shock absorber lower eye from strut rod
shaft.
3.
Disconnect and remove strut rod shaft and swing
strut rod down.
4.
Remove four bolts securing axle drive shaft to
spindle flange and disconnect drive shaft.
NOTE:
It may be necessary to force torque
arm outboard to provide clearance to drop drive
shaft.
5. Disconnect brake line at wheel cylinder inlet or
caliper and from torque arm. Disconnect parking
brake cable.
6. Remove torque arm pivot bolt and toe-in shims and
pull torque arm out of frame. Tape shims together
and identify for correct reinstallation.
RETAINER
RETAINER
PLATE
BUSHING
CONTROL ARM
Fig.
63—Torque Control Arm Bushing Cross-Sect ion (Corvette)
NOTE:
For service operations pertaining to
the spindle support assembly, refer to service
operations under Wheel Spindle and Support
earlier in this section.
Repairs (Fig. 63)
1.
Using 11/16" drill, drill out flared end of bushing
retainer (fig. 64).
2.
Remove special retainer plate and tap retainer out
of bushing.
3.
Remove bushings by spreading them apart with a
chisel and tap out of arm (fig. 65).
NOTE:
If bushing diameters are severely
rusted in torque arm, and arm tends to spread
during removal, clamp arm in a C-clamp to
prevent spreading.
Fig.
64—Drilling Out Retainer Flare (Corvette)
CHEVROLET CHASSIS SERVICE MANUAL