
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 4-14
Fig.
32—Upper Control Arm Bushing Installation (Chevrolet)
Installation
1.
Position rear of control arm into axle bracket and
loosely install the pivot bolt.
2.
Align the forward end of the control arm with the
rear crossmember and install front bracket bolts
through holes. Raise or lower nose of carrier as
/ required to help align bracket and crossmember.
3.
Install crossmember reinforcement plate, lock
washers and nuts to retain bracket in place.
4.
Position vehicle so that weight is on suspension
components and torque all affected parts to
specifications.
Chevrolet Lower
Removal
1.
Raise vehicle and remove shock absorber and spring
as outlined in this section.
NOTE:
If both rear suspension lower control
arms are to be removed, support the rear axle
in such a manner to prevent damage to brake
lines and to prevent assembly from falling.
2.
Note position of control arm in forward attaching
bracket and disconnect control arm at forward and
rearward attaching points. Remove assembly from
vehicle.
Bushing Replacement
Lower control arm front and rear bushing assemblies
are not interchangeable and require separate removal
and installation procedures.
1.
Replace the front bushing as follows.
a. Center Receiver J-7574-4 over flanged end of
bushing and position Spacer J-7574-3 over bush-
ing and between sides of control arm. Using
Remover J- 7574-1 against small end of bushing,
press bushing from control arm. Refer to Figure
33 for installed view of tools.
b.
Position bushing in control arm making sure of
correct installation. Small end of bushing will
pass through one side without any interference.
c. Position Puller Screw J-21058-15 through In-
staller Adapter J-7574-2--head of puller screw
should rest against flat side of adapter.
d. Install adapter and screw through bushing with
adapter resting against flange portion of bushing.
Install Receiver J-21058-6 and Bridge J^-21058-7
on opposite side of control arm (fig. 34).
e. Install thrust bearing and Nut J-21058-8. Screw
nut against J-21058-7 to maintain proper relation-
Fig.
33—Lower Control Arm Front Bushing Removal (Chevrolet)
Fig. 34—Lower Control Arm Front Bushing Installation
(Chevrolet)
CHEVROLET CHASSIS SERVICE MANUAL

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 4-40
Fig.
106—Removing Propeller Shaft from Companion Flange
PROPELLER SHAFT (SAGINAW)
Removal
1.
Raise vehicle sufficiently to permit access to propel-
ler shaft and mark relationship of rear yoke to
companion flange.
2.
Remove trunnion bearing retaining strap attaching
screws from both bearings (fig. 106).
3.
Lower rear of propeller shaft, being careful not to
dislodge bearing caps from trunnion, and tape bear-
ing caps to trunnion.
4.
Withdraw propeller shaft front yoke from transmis-
.sion by moving shaft rearward, passing it under the
axle housing. Watch for oil leakage from transmis-
sion output shaft housing.
Repairs
NOTE:
Because of the elastic properties of the
nylon retainers, the trunnions must be pressed
from the yokes. Pressing the trunnions from the
yokes will shear the retainers which renders
the bearing caps unsuitable for reuse. A service
Jdt, which employs a snap ring to retain the
trunnion, must be used when reassembling the
propeller shaft (fig. 107).
1.
Remove trunnion at differential end of propeller shaft
Fig.
107—Service Kir Trunnion (Saginaw)
Fig.
108—Pressing Trunnion Bearing from Propeller Shaft
using the following procedure:
a. Support trunnion on a press bed so that the
propeller shaft yoke can be moved downward.
Support front of propeller shaft so that shaft is
in a horizontal position.
b.
Using a piece of pipe or similar tool, with an ins-
side diameter slightly larger than 1 1/8", press
bearing from yoke (fig. 108).
c. Apply force on yoke around bearing until nylon
retainer breaks. Continue to apply force until the
downward movement of the yoke forces the bear-
ing as far as possible from the yoke (fig. 109).
d. Complete removal of bearing by tapping around
circumference of exposed portion with a small
hammer (fig. 110).
e. Rotate propeller shaft so that opposite bearing
-may be removed in the manner described above.
f. Remove trunnion from yoke.
Remove trunnion at transmission end of propeller
shaft using the following procedure:
a. Support splined yoke on a press bed and the rear
of the propeller shaft on a stand so that shaft is
horizontal. Be sure that weight is evenly dis-
tributed on each side of the splined yoke and that
the fixed yoke half of the "U" joint is free to
move downward.
b.
Using a piece of pipe or similar tool, with an
inside diameter slightly larger than 1 1/8", press
bearing from yoke (fig. 108).
c. Apply force on yoke around bearing until nylon
retainer breaks. Continue to apply force until the
downward movement of the yoke forces the bear-
ing as far as possible from the yoke (fig. 109).
d. Complete removal of bearing by tapping around
circumference of exposed portion with a small
hammer (fig. 110).
e. Rotate propeller shaft so that opposite bearing
may be removed in the manner described above.
f. Remove splined yoke and trunnion from propeller
shaft.
CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-5
LEVEL CYLINDER
TILTED CYLINDER
Fig.
8—Correct Main Cylinder Fluid Level
expelled brake fluid flows in a solid stream from the
bleeder hose and no bubbles are present, then close
bleeder valve tightly.
6. Remove brake bleeder wrench and bleeder hose from
wheel cylinder bleeder valve.
7. Repeat Steps 2 through 7 on the remaining wheel
cylinders in the correct bleeding sequence (fig. 5).
8. Fill the main cylinder to the levels shown in
Figure 8.
9. Install main cylinder diaphragm and cover.
PUSH ROD TO MAIN CYLINDER CLEARANCE
The brake pedal has a definite stop which is permanent
and not adjustable. This stop consists of a rubber
bumper at the release end of pedal travel. Before
adjusting push rod to main cylinder clearance, make
sure pedal returns to the fully released position freely
and that the pedal retracting spring has hot lost its
tension, then proceed as follows:
1.
Loosen check nut on push rod.
2.
Turn push rod as required to provide correct ad-
justment. Movement of pedal pad before push rod
contacts main cylinder pistons must be 1/16" to
1/4" (fig. 9).
3.
Tighten check nut against clevis, and recheck
movement.
HYDRAULIC BRAKE LINES
Hydraulic Brake Hose
The flexible hoses which carry the hydraulic pressure
from the steel lines to the wheel cylinders are carefully
designed and constructed to withstand all conditions of
stress and twist which they encounter during normal
vehicle usage.
The hoses require no service other than periodic
inspection for damage from road hazards or other like
sources. Should damage occur and replacement become
necessary, the following procedure is to be followed.
Removal
1.
Separate hose from steel line by turning double
flare connector out of hose fitting.
2.
Remove "U" shaped retainer from hose fitting and
withdraw hose from support bracket.
3.
Turn hose fitting out of wheel cylinder inlet.
Replacement
1.
Install new copper gasket on cylinder end of hose
(male end).
2.
Moisten threads with brake fluid and install hose in
wheel cylinder inlet.
3.
With weight of car on wheels and suspension in
normal position (front wheels straight ahead) pass
female end of hose through support bracket, allowing
hose to seek its own position. Insert hex of hose
fitting into the 12 point hole in support bracket
in position which induces least twist to hose (figk 10).
NOTE:
Do not twist hose unduly during ^
operation as its natural curvature is absolutely
necessary to maintain proper hose-tot
suspension clearance through full movement o£
the suspension and steering parts.
4.
Install "U" shaped retainer to secure hose in sup-
port bracket.
5. Inspect by removing weight completely from wheel,
turn wheels from lock to lock while observing hose
position. Be sure that hose does not tough other
parts at any time during suspension or wheel travel.
If contact does occur, remove hose retainer and
rotate the female hose end in the support bracket
CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-13
Fig.
1L- In
Line Engines (Typical)
NOTE:
If plug for propeller shaft open-
ing in transmission is not available, drain
transmission.
10.
11.
12.
Disconnect:
• Shift linkage at transmission.
• Speedometer cable at transmission.
On synchromesh equipped vehicles, disconnect clutch
linkage at cross-shaft then remove cross-shaft en-
gine bracket.
Remove rocker arm cover as outlined, then attach
engine lifting adapter at the proper cylinder head
bolt locations.
13.
Remove front mount through bolts.
14.
Attach lifting device and raise engine to take weight
off front mounts, then remove rear mount bolts.
15.
Raise engine to take weight off rear mount, then
remove crossmember.
NOTE:
On Chevrolet vehicles it will be neces-
sary to remove mount from transmission before
crossmember can be removed.
NOTE:
On Camaro vehicles it will be neces-
sary to remove mount from transmission and
loosen rear frame cushion bolts before cross-
member can be removed.
16.
Remove engine-transmission assembly from vehicle
as a unit.
17.
Remove transmission (and clutch):
Synchromesh Transmission
a. Remove clutch housing cover plate screws.
b.
Remove bolts attaching the clutch housing to en-
gine block then remove transmission and clutch
housing as a unit.
NOTE:
Support the transmission, as the last
mounting bolt is removed, and as it is being
pulled away from the engine (to prevent damage
to clutch disc).
c. Remove starter and clutch housing rear cover.
d. Loosen clutch mounting bolts a turn at a time (to
prevent distortion of clutch cover) until the spring
pressure is released. Remove all bolts, clutch
disc and pressure plate assembly.
Automatic Transmission
SL.
Lower engine, secured by the hoist, and support
engine on blocks.
b.
Remove starter and converter housing underpan.
c. Remove flywheel-to-converter attaching bolts.
d. Support transmission on blocks.
e. Remove transmission-to-engine mounting bolts.
f. With the hoist attached, remove blocks from the
engine only and slowly guide the engine from the
transmission.
18.
Mount engine in stand.
Installation
1.
Attach lifting device to engine and remove engine
from engine stand.
2.
Install transmission (and clutch):
Synchromesh Transmission
a. Install the clutch on flywheel as outlined in Sec-
tion 7.
b.
Install clutch housing rear cover and starter.
c. Install transmission and clutch housing as out-
lined in Section 7.
d. Install clutch housing cover screws and tighten
securely.
Automatic Transmission
a. Position engine adjacent to the transmission and
align the converter with the flywheel.
CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-17
Fig.
5L
-
Engine Blocked for Pan Removal
NOTE: Do not install rocker arm cover.
11.
Start engine and allow warm up then retorque cylin-
der head
as
outlined in Step 4 and readjust valves as
outlined under Engine Tune Up.
OIL PAN
Removal
Chevrolet
and Camaro
1.
Disconnect battery positive cable.
2.
Remove through bolts from engine front mounts.
3.
Drain radiator, then disconnect upper and lower ra-
diator hoses at radiator.
4.
Remove fan blade as outlined in Section 6K.
5.
Raise vehicle then drain engine oil.
6. Disconnect and remove* starter.
7.
On
vehicles equipped with automatic transmission,
disconnect transmission cooler lines at transmission
and remove converter housing underpan.
8. Disconnect steering
rod at
idler lever then swing
steering linkage for oil pan clearance.
9. Rotate crankshaft until timing mark
on
torsional
damper is at 6:00 o'clock position.
10.
Using
a
suitable jack (and a block of wood to prevent
damaging oil pan), raise engine enough to insert 2"
x
4"
wood blocks under engine mounts (fig. 5L), then
lower engine onto blocks.
NOTE:
If
2"
x
4" wood blocks are cut 5-1/2"
long they can be used on all Chevrolet engines.
The 5-1/2" length up for in line engines and the
4"
side up for V8 engines.
11.
Remove oil pan and discard gaskets and seals.
Cfievel/e
1.
Remove enginfe from vehicle as outlined.
2.
Place engine on jack stands, one at each front mount
and one at transmission extension.
CAUTION: Leave engine lift attached
to
en-
gine.
Do not remove all weight
of
engine from
engine lift.
3.
On
vehicles equipped with automatic transmissions
remove converter housing underpan.
4.
Remove starter.
5.
Remove oil pan and discard gaskets and seals.
Chevy//
1.
Disconnect battery positive cable.
2.
Drain engine oil.
3.
Disconnect then remove starter.
4.
Disconnect-steering idler arm bracket at right hand
frame rail and swing steering linkage down for pan
clearance.
5.
On L6 engines, remove front crossmember.
NOTE:
On
station wagon
let
stabilizer
bar
hang while removing crossmember.
"
6. Remove oil pan and discard gaskets and seals.
Installation
1.
Thoroughly clean all gasket sealing surfaces.
NOTE: Use
a
new pan gasket set.
2.
Install rear seal in rear main bearing cap.
3.
Install front Seal on crankcase front cover pressing
tips into holes provided in cover.
4.
Install side gaskets on cylinder block (fig. 6L).
5.
Complete installation as follows:
Life
1
i
If ^
jfp^;.^3p
>\~^^ \s3^^r' -'••'•'-^^Hll
|^=-5p|:*iil^
mm
Fig.
6L
-
Pan Gaskets and Seals
CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-19
OIL SEAL (REAR MAIN)
Replacement
The rear main bearing oil seal can be replaced (both
halves) without removal of the crankshaft.
NOTE:
Always replace the upper and lower
seal as a unit. Install with the lip facing toward
the front of the engine.
1.
With the oil pan removed, remove the rear main
bearing cap.
2.
Remove oil seal from the groove by lifting the end
tab (fig. 7L) then clean seal groove.
3.
Lubricate the lip and O.D. of a new seal with engine
oil. Keep oil off the parting line surface. Insert
seal in cap and roll it into place with finger and
thumb,
using light pressure so beads on seal O.D.
are not cut by seal groove at cap parting line. Be
sure tabs on seal are properly located in cross
grooves.
4.
To remove the upper half of the seal, use a small
hammer to tap a brass pin punch on one end of seal
until it protrudes far enough to be removed with
pliers (fig. 8L).
NOTE:
Always clean crankshaft surface re-
moving all foreign deposits before installing a
new seal. Also clean seal groove.
5. Lubricate the lip and O.D. of a new seal with engine
oil. Keep oil off the parting line surface. Gradually
push with a hammer handle, while turning crank-
shaft, until seal is rolled into place. (Similar to in-
stalling a main bearing.) Be careful that seal bead
on O.D. is not cut. Compress seal towards crank-
shaft as much as possible.
6. Install the rear main bearing cap (with new seal) and
torque to specifications. Be sure cross seal tabs
are in place and properly seated.
CRANKSHAFT PULLEY AND HUB
(Chevy II with L4 Engine)
Removal
1.
Drain radiator and disconnect upper and lower radi-
ator hoses at radiator.
2.
Remove radiator core as outlined in Section 13.
3.
Remove fan belt. Remove crankshaft pulley from
pulley hub.
4.
Install puller Tool J-6978 to pulley hub with two
3/8"
x 2" and one 5/16" x 2" bolts and remove hub
then remove puller tool.
Installation
1.
Coat oil seal contact area on hub with engine oil
position hub over crankshaft and key and start hub
into position with a mallet. Using Tool J-5590 drive
onto crankshaft until it bottoms against crankshaft
gear.
NOTE:
Crankshaft extends slightly through hub
and a tool is necessary to drive hub completely
into bottomed position.
2.
Install pulley onto hub.
NOTE:
There are two 3/8" holes and one
5/16" hole that must be matched on hub in order
Fig.
9L - Removing Torsional Damper
to properly position timing mark.
3.
Install fan belt and adjust using strand tension gauge.
4.
Install radiator as outlined in Section 13.
TORSIONAL DAMPER
Removal
1.
Remove radiator core, as outlined in Section 13.
2.
Remove fan belt and (if so equipped) accessory drive
pulley and belt.
3.
Install Tool J-6978 to damper and turn puller screw
to remove damper (fig. 9L). Remove tool.
Installation
1.
Coat front cover oil seal contact area of damper with
engine oil.
CAUTION: It is necessary to use installer
Tool J-22197 to prevent the inertia weight sec-
Fig.
10L - Installing Torsional Damper
CHEVROLET CHASSIS SERVICE MANUAL