REAR SUSPENSION AND DRIVE LINE 4-15
ship of parts, then install Spacer J-
7574-
3 over
the partially installed bushing and between the
sides of the control arm.
f. Continue to tighten J-
21058-
8
until bushing is
pulled flush against control arm. Do not exert
undue force against control arm after bushing is
installed. Overtightening of J-21058-
8
will cause
damage to walls of control arm.
g. Disassemble tools and inspect bushing for proper
installation.
Replace the rear bushing as follows:
a. Position Puller Screw J-21058-8 through Re-
mover Adapter J-21830-2 so that head of screw
is opposite button end of remover. Install this
assembly, threaded end of sc'rew first, through
bushing to be removed.
b.
Install Receiver J-21830-4 and Bridge J-21830-7
. over screw and against control arm. Position
thrust bearing against J-21830-7 and screw
J-21058-8 snugly against bearing. Install Spacer
J-
2183d-
3
between sides of control arm and over
bushing.
c. Check tool installation for proper alignment and
tighten J-21058-8 to withdraw bushing from con-
trol arm. Refer to Figure 35 for installed view
of tools.
d. Disassemble tools and position Installer Adapter
J-21830-2 on flanged end of new bushing. Posi-
tion bushing in control arm making sure of cor-
rect installation. Small end of bushing will pass
through one side of arm without any interference.
e. Install J-21830-4, J-21830-7, thrust bearing and
J-21058-8 on threaded end of J-21058-15 as
shown in Figure 36. Tighten J-21058 to main-
tain proper relationship of parts; then position
Spacer J- 21830- 3 over bushing and between sides
of control arm.
f. Tighten J-21058-8 until bushing is fully seated
J-21058-8 J-21830-7 J-21830-4 J-21830-3 J-21830-2
\
J-2K
X
D58-8
J-218
30-7
IP
•he?
21830-4
J-21830-2
JfSir
J-21830-3
Fig.
35—Lower Control Arm Rear Bushing Removal
(Chevrolet)
Fig.
36—Lower Control Arm Rear Bushing Installation
(Chevrolet)
against side of control arm. Do not apply undue
pressure to J-21058 after bushing is seated--to
do so may cause permanent distortion to control
arm.
g. Disassemble tools and check bushing for proper
installation.
Installation
NOTE:
Make sure control arm is reinstalled
in proper forward attaching position. Reinstall
in same hole as noted during removal. Top
attaching hole is used for all installations except
station wagons and heavy-duty suspension (RPO
F41).
Opposite arm must be installed in cor-
responding position.
1.
Position the control arm between the mounting
brackets and loosely install the pivot bolt retaining
nuts in the proper position.
2.
Install spring and shock absorber as outlined in this
section.
3.
Lower vehicle so that weight is placed on sus-
pension components and torque all affected parts to
specifications.
Chevelle Upper and Lower
Removal
NOTE:
If both upper control arms and both
lower control arms are to be removed at the
same time, remove both coil springs as outlined
under "Coil Spring Removal".
1.
Raise vehicle to a height that will allow axle assem-
bly to hand freely and position supports under both
frame side rails.
2.
Support axle assembly with an adjustable lifting de-
vice and raise rear axle assembly until tension is
relieved in control arm being removed.
3.
Disconnect control arm at forward and rearward
attaching points and remove from vehicle.
Bushing Replacement
The upper arm front bushing and carrier ear bushings
are of the same part number and are interchangeable.
CHEVROLET CHASSIS SERVICE MANUAL
REAR SUSPENSION AND DRIVE LINE 4-16
J-21474-5 J-21474-1
J-21058-8 /__* A r-j-21474-2
Fig.
37-Control Arm Bushing Removal (Chevelle)
However, the lower control arm bushings are of a dif-
ferent rubber material and are not interchangeable with
the upper bushings. Replacement procedures are in-
dicated below.
1,
Replace the control arm installed bushings as
follows:
a. Position control arm in a vise, or other suitable
holding device, so that clamping action is against
closed section of control arm.
b.
Place Puller Screw J-21058-15 through Puller
Adapter J-21474-2. Position puller screw through
small end of bushing then install Receiver
J-21474-5. Thrust Bearing and Nut J-21058-8
(in that order) onto puller screw. Install Spacer
J-21474-1 between sides of control arm and over
bushing so that spacer follows contour of bushing.
Refer to Figure 37 for installation of removal
tools.
c. Turn Nut J-21058-8 to withdraw bushing, making
sure Remover Adapter J-21474-2 is centered
and will clear hole in control arm.
d. Disassemble puller tools and position Installer
Adapter J-21474-2 on flanged end of new bushing.
Position Puller Screw J-21058-15 through in-
staller adapter and bushing; then place assembly
through hole in control arm.
NOTE:
Bushings are installed in one direction
only - flanged end of bushing seats against rolled
cutout side of control arm.
e. Install Receiver J-21474-5, Thrust Bearing, and
J-21058-15 J-21474-1
Fig.
39—Carrier Mounted Suspension Bushing
Removal (Light-Duty) (Chevelle)
Nut J-21058-8 (in that order) onto puller screw.
Install Spacer J-21474-1 between sides of control
arm and, over bushing so that spacer follows
contour of bushing. Refer to Figure 38 for in-
stalled view of tools.
f. Turn Iftit J-21058-8 to pull bushing into control
arm. Check position of bushing when installing
to make sure bushing is properly aligned. Seat
flanged end of bushing firmly against control
arm, but do not apply unnecessary force after
bushing is seated - to do so will distort control
arm.
2.
Replace the carrier mounted, upper control arm rear
bushing using the following procedure.
Light-Duty Carrier
a. Position Puller Adapter J-21474-2 on Puller
Screw J-21058-15 then place puller screw through
small end of bushing.
b.
Install Receiver J-21830-4, Bridge J-21830-7,
Thrust Bearing, and Nut J-21058-8 (in that order)
onto puller screw. Refer to Figure 39 for in-
stalled view of tools.
Fig.
38—Control Arm Bushing Installation (Chevelle)
Fag.
40—Carrier Mounted Suspension Bushing
Installation (Light-Duty) (Chevelle)
CHEVROLET CHASSIS SERVICE MANUAL
REAR SUSPENSION AND DRIVE LINE 4-17
Fig.
41—Carrier Mounted Suspension Bushing Removal
(Heavy-Duty) (Chevelle)
c. Turn Nut J-21058-8 to remove bushing from
carrier ear, making sure Remover Adapter
J-21474-2 is centered and will clear hole in
carrier ear.
d. Disassemble puller tools and position Installer
Adapter J-
21474-
2 on flanged end of bushing.
Install Puller Screw J-21058-15 through receiver
so that screw head is seated against receiver.
Position this assembly through inboard side of
carrier ear.
e. Position bushing and Installer Adapter J-21474-2
onto puller.screw with small end of bushing to-
ward carrier ear. Refer to Figure 40 for in-
stalled view of tools.
f. Install Thrust Bearing and Nut J-21058-8 onto
puller screw. Turn nut to pull bushing into car-
rier ear. Check position of bushing when install-
ing to make sure bushing is properly aligned.
b.
c.
d.
Fig.
43—Upper and Lower Control Arm Assembly
(Chevelle)
Heavy-Duty
Carrier
a. Install a 1/2 x 20 nut on Puller Screw J-21058-15,
install thrust bearing against nut. Position puller
screw through Bridge and Receiver J-21830-4
and 7.
Position puller screw through flanged end of
bushing then install Remover Adapter J-21991
on threaded end of puller screw.
Align tools on carrier ear and center remover
adapter on bushing. Hold head of puller screw
and turn 1/2 x 20 nut to withdraw bushing from
carrier ear. Refer to Figure 41 for installed
view of removal tools.
Position Installer J-21474-2 on flanged end of
new bushing and install Driver Handle J-7079-2
to opposite end of installer.
e. Position bushing in carrier ear and drive bush-
ing until it seats against carrier. Bushing is
properly seated when shoulder on bushing con-
tacts carrier. Refer to Figure 42 for installation.
NOTE:
Do not attempt to seat flange of bush-
ing against ear of carrier. Bushing is properly
installed when shoulder on bushing seats against
chamfer on carrier ear.
Installation
1.
Place control arm into position between the forward
and rearward mounting brackets and install retaining
bolts.
Refer to Figure 43 for installation view of
control arms.
Support vehicle at axle and remove supports from
beneath the frame side rails.
Install lock washer and nut to retaining bolts and
2.
3.
torque to specifications.
Fig.
42—Carrier Mounted Suspension Bushing Installation
(Heavy-Duty) (Chevelle)
REAR SUSPENSION TIE ROD-CHEVROLET
Removal
1.
Remove the nut, washer and bolt from the leftside
and the nut and washer from the stud on the right
side that secure the tie rod to the brackets (fig. 44).
Withdraw the rod from under the vehicle. An ex-
ternal shell service bushing is available for left side
on all models and both right and left on station
wagons.
NOTE:
The above operations need not be per-
formed on a hoist. However, to provide ample
working space, the use of a hoist or proper jack
stand is recommended.
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
4-19
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
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