
FRONT SUSPENSION 3-21
Chevy II
Removal
1.
Support control arm on Tool J-7 574-4 and insert
Spacer J-9514 (fig. 34).
2,
Press bushing out with Tool J-9226 and Handle
J-7079-2 (fig. 34).
Installation
With Spacer J-9514 still in control arm, invert control
arm and press in new bushing with Tool, J-7474-2 and
Handle J-7079-2 until bushing is fully seated.
CAUTION: It should be noted that control arm
bushing diameters are unequal and bushing must
be pressed into position through larger diameter
only.
CROSS SHAFT AND/ON BUSHINGS
Corvette
Removal
1.
Remove bolt, lock washer and collar from each end
of cross shaft.
2.
Thread a 7/16 x 20 capscrew (furnished with Tool
J-5888) to the bottom of the threads in one end of the
cross shaft.
3.
Support control arm in an arbor press on Tool
J-5888-3,
as shown in Figure 35.
NOTE:
Be certain bushing flange does not
contact support.
4.
Press on cap screw until bushing is free of control
arm. Discard bushing.
5. Remove cap screw from cross shaft. Insert it in
other end of shaft. Invert control arm on support.
Again be certain bushing flange does not contact
support.
6. Press on cap screw until bushing is free of control
arm. Discard bushing.
Installation
1.
With cross shaft in control arm and Tool J-7052-1
in position, place control arm on Tool J-5888-3.
Hand start bushing into control arm and over end of
cross shaft.
NOTE:
The end of the shaft with the two bolt
holes should be toward front of control arm.
2.
Install Tool J-7052-5 over bushing. Be certain
three-piece spacer is not over-lapping bushing holes
in control arm.
3.
Press bushing into control arm until flange contacts
control arm (fig. 36).
4.
Invert arm in press and repeat the process on the
other bushing. After installation, cross shaft should
be free enough to be rotated by hand.
5. Install collar, lock washer and cap screw in each end
of cross shaft. Tighten to torque shown in Specifica-
tions after spring installation.
UPPER CONTROL ARM SPHERICAL JOINT
Chevrolet, Chevelle, Comoro and Corvette
Inspection
The upper spherical joint is checked for wear by
checking the torque required to rotate the ball stud in the
assembly. After performing the first four steps under
"Replacement" below, install a stud nut on the stud and
measure the torque required to turn the stud in the as-
sembly with a torque wrench. Specified torque for a new
joint is 9 lbs. ft. If torque readings are excessively
high or low, replace the ball joint. If excessive wear is
indicated in upper joint, both upper and lower joints
should be replaced.
NOTE:
This inspection does not necessitate
upper control arm removal.
Replacement
1.
Support the vehicle weight at the outer end of the
lower control arm.
2.
Remove the wheel and tire assembly.
3.
Remove cotter pin and nut from upper control arm
ball stud.
4.
Remove the stud from knuckle.
5. Cut off the ball joint rivets with a chisel.
6. Install new joint and retain in place with the special
nuts and bolts supplied.
7. Reassemble ball stud to the steering knuckle.
Chevy II
Inspection
The following on-the-vehicle check is to determine ball
joint wear.
NOTE:
The upper ball joint is a loose fit when
not connected to the steering knuckle. Wear may
be checked without disassembling the ball stud
by
using'
the following procedure:
1.
While vehicle weight is still on front wheels, insert
upper control arm support as shown in Figure 14.
2.
Raise vehicle and allow wheel and tire to hang free.
3.
Measure distance from tip of ball stud to top surface
of control arm.
4.
Place adjustable jackstand under tire and raise
slightly to take up ball joint looseness.
5. Repeat Step 3 and if the difference in measurements
exceeds 3/32", the joint is excessively worn and
should be replaced.
Replacement
1.
With vehicle weight still on front wheels, install
spacer between upper control arm and frame side
rail (fig. 15). Raise vehicle.
2.
Remove wheel and tire.
3.
Disconnect stabilizer link (if present) and strut rod
at lower control arm.
4.
Remove cotter pin and nut from upper ball joint stud.
5. Break ball stud loose. Drop lower control arm,
steering knuckle and brake assembly with an adjust-
able jackstand until upper control arm ball joint is
easily accessible.
6. Using a large chisel, cut off the three ball joint re-
taining plate rivet heads. It may be necessary to
drill out rivet heads before chiseling.
CHEVROLET CHASSIS SERVICE MANUAL

FRONT SUSPENSION 3-25
Installation
1.
Insert new bushing in control arm and over pivot
shaft.
2.
Support arm on J-5888-3 and insert Spacer J-
8345-1.
5.
Press bushing into place with Installer J-9513-3
(fig. 40).
Invert arm and press remaining bushing in place with
J-9513-3.
Install bushing spacers, lock washers and nuts
to pivot shaft ends. Torque as indicated in
Specifications.
NOTE:
Pivot shaft bolts must be in horizontal
position (toward center line of vehicle) before
torquing nuts.
Corvette
Removal
1.
Remove cap screws, lock washers and collars from
both ends of cross shaft.
2.
Install a 3/8-24 cap screw (furnished with Tool
J- 5888) in one end of cross shaft.
3.
Support control arm in an arbor press on Tool
J-5888-3 as shown in Figure 41.
NOTE:
Be certain flange of bushing does not
contact support.
4.
Press out bushing, invert control arm and repeat
process on other bushing. Discard bushings.
5. Remove cap screw from cross shaft.
Installation
1.
Install arm in arbor press with Tool J-7052-2 in
place and press in one bushing while supported on
Tool J-5888-3 as shown in Figure 42.
2.
Install cross shaft in arm, invert in press, and press
in second bushing as above.
3.
Cross shaft should be able to be turned by hand.
4.
Install collar, lock washer and cap screw in ends of
cross shaft. Do not tighten.
CHEVROLET CHASSIS SERVICE MANUAL

REAR SUSPENSION AND DRIVE LINE 4-6
Fig.
10—Toe-in Adjusting Shim Location (Corvette)
Toe-in
Wheel toe-in is adjusted by inserting shims of varying
thickness inside the frame side member on both sides
of the torque arm pivot bushing (fig. 10). Shims are
available in thicknesses of
1/64",
1/32",
1/8" and 1/4".
To adjust toe-in, remove torque arm pivot bolt; then
position torque arm to obtain specified toe-in. Shim gap
toward vehicle centerline between torque arm bushing
and frame side inner wall.
NOTE: Do not use thicker shim than necessary,
and do not use undue force when shimming inner
side of torque arm - to do so may cause toe
setting to change.
Shim outboard gap as necessary to obtain solid stack-
up between torque arm bushing and inner wall of frame
side member. After correct shim stack has been se-
lected, install pivot bolt and hardened washers (fig. 10) -
making sure that all shims are retained - torque nut to
specifications and install cotter pin. If specified torque
does not permit cotter pin insertion, tighten nut to next
flat.
WHEEL BEARING ADJUSTMENT (CORVETTE)
inspection
The tapered-roller spindle bearings should have end
play of .001" to
.008".
During inspection, check end
play and, when necessary, adjust as outlined in this
section.
1.
Raise rear of vehicle until wheels clear ground.
2.
Disengage bolt lock tabs and disconnect outboard end
of axle drive shaft from wheel spindle flange.
3.
Mark camber cam in relation to bracket. Loosen and
turn camber bolt until strut rod forces control arm
outward. Position loose end of axle drive shaft to
one side for access to spindle.
4.
Remove wheel and tire assembly. Mount dial in-
dicator (Tool J-8001) on torque arm or adjacent
surface and rest pointer on flange or spindle end
(fig. H).
5.
Grasp brake disc and move axially (in and out) while
reading movement on dial indicator. If end movement
is within the .001" to .008" limit, bearings do not
require adjustment. If not within .001" to .008"
limit, record reading for future reference and adjust
bearings as outlined below.
Adjustment
1.
Apply parking brake to prevent spindle from turning
and remove cotter pin and nut from spindle.
2.
Release parking brake and remove drive spindle
flange from splined end of spindle.
3.
Remove brake caliper and brake disc as outlined in
Section 5.
4.
Install Thread Protector J-21859-2 over spindle
threads; then remove drive spindle from spindle
support, using Tool J-22602 as shown in Figure 12.
CAUTION: When using Tool J-22601 to remove
drive spindle, make sure puller plate is posi-
Fig.
11—Checking Wheel Bearing Adjustment (Corvette)
Fig. 12—Removing Drive Spindle from Support (Corvette)
CHEVROLET CHASSIS SERVICE MANUAL

REAR SUSPENSION AND DRIVE LINE 4-9
Fig.
17—Rear Spring—Exploded View (Chevy II)
LEAF SPRING, SPRING SEAT PADS, SPRING EYE
BUSHINGS Chevy II (Fig. 17)
Removal
1.
Raise vehicle and support rear axle assembly.
2.
Pull parking brake cable out of lower spring pad
mounting bracket clamp and disconnect cable above
axle housing. Remove four nuts securing lower
spring pad mounting bracket to axle spring seat
(fig. 18). Drop lower bracket and remove rubber
spring pad.
3.
Loosen and drive out front spring eye bolt. Lower
spring and remove front rubber eye bushing (fig. 19).
4.
Remove nuts from rear spring shackle (fig. 20),
spread shackle to separate it from spring eye and
support bracket and remove spring. Remove rear
spring eye bushings.
5.
Remove upper spring pad cushion.
Installation
1.
Inspect spring eye bushings and spring pads for ex-
cessive wear or aging and replace as necessary.
Inspect spring rear shackles, front spring bracket
and eye bolt for bending or cracking and correct
where needed.
2.
Assemble spring rear shackle as follows:
a. All except Station Wagons (fig. 21).
Fig.
19—Removing Front Eye Bushings (Chevy II)
3.
' Fig. 20—Disassembling Rear Spring Shackle (Chevy II)
1.
Insert inboard rubber spring eye bushings into
i'ear spring eye and outboard shackle bushings
into shackle mounting bracket.
2.
Position spring and install shackle to spring
and mounting bracket with top nut toward out-
board of vehicle and bottom nut toward vehicle
centerline.
3.
Tighten nuts but-do not torque at this point,
b.
Station Wagon (fig. 22):
When installing shackle as in Step 2 above, top
nut should be toward centerline of vehicle and
bottom nut toward outboard of vehicle.
Insert inboard rubber bushing into front spring eye.
Fig.
18—Removing Lower Pad Bracket (Chevy II)
Fig.
21—Rear Spring Shackle Exploded View-All
Except Station Wagon (Chevy II)
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
4-19
BRAKE BRAKE
DISC SHOE
OUTER
BEARII
-. -,
-«#*;>•
BRAKE
CAMPER
/
/ /
/ /
si—a
wC—
SPINDLE
^ SUPPOR1
BEARING
^ SPACER
INNER
" BEARING
DRIVE
" FLANGE
BEARING
-PRELOAD
SPACER
DEFLECTOR
CONTROL
ARM
Fig.
46-Wheel Spindle
and
Support Cross-Section (Corvette)
assembly is installed.
d. Pack outer bearing with a high-melting point
wheel bearing lubricant and position on spindle.
Large end of bearing should be toward shoulder
on spindle.
e. Press bearing on spindle using a bearing spacer
and Tool J-9436 as installers, as shown in Fig-
ure 50.
5. Pack spindle inner bearing with a high-melting point
-wheel bearing lubricant and position bearing in
spindle support - small end of bearing should be
positioned inward.
PRESS RAM
BEARING CUP
Fig.
48—Installing Spindle Bearing Cup (Corvette)
Fig.
49—Unseating Drive Spindle Outer Bearing (Corvette)
Fig.
47—Bearing Cup Removal (Corvette)
Fig.
50—Removing and Installing Drive Spindle
Outer Bearing (Corvette)
CHEVROLET CHASSIS SERVICE MANUAL

REAR SUSPENSION AND DRIVE LINE 4-20
Fig.
51—Shock Absorber Installation (Corvette)
6. Tap new spindle inner grease seal into seal bore
and install deflector over support inner end.
Installation
1.
Position support over torque arm bolts with strut
rod fork toward center of vehicle and downward.
Place backing plate over studs and torque nuts to
specifications.
2.
Connect parking brake cable to actuating lever.
3.
Install drive spindle assembly as outlined previously
in this section under "Wheel Bearing Adjustment".
4.
If new spindle support or associated parts are in-
stalled, determine correct shim size as follows.
a. Assemble spindle to support, using a .145" shim.
b.
Check bearing adjustment and correct as neces-
sary, following adjustment procedures previously
outlined.
DIFFERENTIAL CARRIER SUPPORT
BRACKET REPLACEMENT
1.
Place a 1/2" thick block of wood or steel between
nose of differential carrier and floor pan. This will
prevent carrier from twisting upward when support
bracket is disconnected.
2.
Remove carrier support-to-crossmember attaching
bolt.
3.
Remove nut from both of the bracket-to-carrier
through bolts.
4.
Slide bolts to one side until bolt head contacts floor
well. Mark the floor well at this point and drill a
3/4"
diameter hole for each bolt in floor well and
remove bolts.
5. Assemble carrier support bracket by reversing
above procedure. Torque all affected parts to
specifications.
6. Insert plastic plugs from the inside of the floor well
holes to prevent dust and water entry.
STRUT ROD SHAFT STRUT ROD
CAMBER CAM
AND BOLT
Fig.
52—Strut Rods (Corvette)
SHOCK ABSORBER (Fig. 51)
Removal
1.
Disconnect shock absorber upper mounting bolt*
2.
Remove lower mounting nut and lock washer.
3.
Slide shock upper eye out of frame bracket and pull
lower eye and rubber grommets off strut rod mount-
ing shaft.
4.
Inspect grommets and shock absorber upper eye for
excessive wear.
Installation
1.
Slide upper mounting eye into frame mounting
bracket and install bolt, lock washer and nut.
2.
Place rubber grommet, shock lower eye, inboard
grommet, washers and nut over strut rod shaft.
3.
Torque nuts to specifications.
STRUT ROD AND BRACKET (Fig. 52)
Removal
1.
Raise vehicle enough to provide working clearance.
2.
Disconnect shock absorber lower eye from strut
rod shaft.
3.
Remove strut rod shaft cotter pin and nut. With-
draw shaft by pulling toward front of vehicle (fig. 53).
4.
Mark relative position of camber adjusting cam and
Fig.
53-Removing Strut Rod Shaft (Corvette)
CHEVROLET CHASSIS SERVICE MANUAL