1967 CHEVROLET CAMARO maintenance

REAR SUSPENSION AND DRIVE LINE
4-4

PROPELLER SHAFT

CARRIER FRONT SUPPORT
CAMBER CAM CONTROL ARM

Fig. 5—Corvette Rear Suspension and Driveline Components

rubber mounted to the frame at three points, with the .

strut rods, drive shafts and torque control arms forming

the three links at each wheel, and a transversely mounted

multi-leaf spring (fig. 5).

The bbx section trailing torque control arms are

mounted at the forward end into frame side member

openings through pivot bolts and rubber bushings, and

extend rearward to connect to the leaf spring. The

wheel spindles and spindle supports are attached to the

torque arms through four bolts pressed into the arm.

Rear wheel toe-in angle is adjusted through the use of

variable thickness shims inserted between the torque

arm and the frame side member web at the forward

pivoting joint.

The rear wheel spindles are driven through double

"U"
jointed, tubular driveshafts which are flange mount-

ed to a splined spindle flange at their outboard end and

bolted to the differential side gear yokes at their in-

board end. Wheel spindle support houses the inner and

outer tapered roller bearings, two to each wheel. Bear-

ing adjustment is made through the use of a spacer and

variable thickness shims between the bearings.

The spindle supports also incorporate integrally
forged, fork-shaped mounting brackets to accept the

outer ends of the rubber-bushed strut rods. The strut

rods are mounted laterally from the spindle support to

a bracket bolted to the lower surface of the axle car-

rier. The strut rod connection at this point is with an

eccentric cam arrangement and provides for rear wheel

camber adjustment.

The direct, double-acting shock absorbers are at-

tached at the upper eye to a frame bracket and at the

lower eye to the strut rod mounting shaft which incor-

porates a threaded stud for. the shock absorber lower

eye.

The transversely mounted multi-leaf spring is clamp

bolted at the center section to a lower mounting surface

on the differential carrier cover. The outer ends of the

main leaf are provided with a hole through which the

spring is link bolted to the rear of the torque control

arms.
The spring assembly is provided with full length

liners.

An optionally available stabilizer shaft attaches to the

upper rear section of the torque arms, and stretches

rearward where it is connected to the frame by two

rubber-bushed mounting brackets.

MAINTENANCE AND ADJUSTMENTS

Periodic maintenance and adjustments are not required

for the rear suspension components. The suspension

system should be checked for shock absorber action,
condition of suspension bushings, tightness of suspension

attaching bolts and an overall visual inspection of com-

ponents for defects.

CHEVROLET CHASSIS SERVICE MANUAL

REAR SUSPENSION
AND
DRIVE LINE
4-26

DRIVE LINE

REAR AXIE

INDEX

Page

General
Description
4-26

Chevrolet,
Camaro,
Chevelle
and
Chevy
II 4-26

Corvette
4-26

Maintenance
and
Adjustments
4-27

Lubricant
4.37

Lubricant'
Leaks
4_27

Axle Bolts
and
Wheel
Nuts
4-27

Rear Axle Noise
Diagnosis
4-29

Gear Noise
4_29

Bearing
Noise
4-29

Failure
Analysis
4^9

Hypoid
Gears
4..3Q

Differential Gears. 4_30

Bearings
....'.
4.30

Component Parts Replacement

(Chevrolet, Chevelle, Camaro and Chevy n ..... 4.30

Axle Assembly ,. . 4_30

Removal 4 30

Installation * ' 4 3Q
Axle Shaft . . . 4-31

Removal 4-31

Wheel Bolt Replacement 4-31

Oil Seal and/or Bearing Replacement. 4-31

Brake Flange Plate Replacement 4-31

Installation 4-32

Pinion Flange, Dust Deflector and/or

Oil Seal Replacement 4-32

Component Parts Replacement (Corvette) 4-34

Axle Driveshaft .- 4-34

Removal 4-34

Repairs 4-34

Installation. . 4-34

Pinion Flange, Dust Deflector and/or Oil Seal. .... 4-35

Removal 4-35

Inspection . 4-35

Installation .- 4-35

Differential Carrier 4-36

Removal 4-36

Installation 4-36

Positraction Differential Unit-On the Vehicle Check . . 4-37

\

GENERAL DESCRIPTION

CHEVROLET, CHEVELLE, CHEVY
I! AND
CAMARO

The rear axle
(fig. 72) is a
semifloating, fabricated

construction type consisting
of a
cast carrier with large

bosses
on
each
end
into which
two
welded steel tubes

are fitted.
The
carrier contains
an
overhung hypoid

pinion
and
ring gear.
The
differential
is a
two pinion

arrangement.

The axle housing
is
made up
of
two steel welded tubes

pressed into
the
crossbore
of the
cast carrier
-
each

tube
is
puddle welded
at
three places
to the
carrier.

Welded-on brackets provide attachment points
for

Chevelle springs,; shock absorbers,
and
lower control

arms.
Chevrolet models have welded-on brackets
for

control arms,
tie
rod, and shock absorbers. The housing

on Chevy II and Camaro has welded brackets
for
mounting

lower spring
pad
and shock absorber.
A
welded flange
is

provided
for
brake flange plate attachment.

The overhung hypoid drive pinion
is
supported
by
two

preloaded tapered roller bearings.
The
pinion shaft
is

sealed
by
means
of a
molded, spring loaded, rubber seal.

The seal
is
mounted
on the
pinion shaft flange which
is

splined and bolted
to
the hypoid pinion shaft.

The hypoid ring gear
is
bolted
to a
one-piece differen-

tial case which
is
supported
by two
preloaded tapered

roller bearings.

CORVETTE

The Corvette rear axle
is of the
type where
the dif-
ferential carrier housing enclosing
the
differential
and

hypoid gears
is
supported
on a
crossmember mounted
to

the chassis frame.
The
differential
is
connected through

universal joints
to the
drive shafts
and
wheels
(fig. 73).

The internal components
of the
carrier
are of
conven-

tional design, incorporating
a
hypoid gear
set
with
an

overhung pinion supported
on two
pre-loaded, tapered

roller bearing assemblies,
and a
two-pinion differential

assembly supported
on
tapered roller bearings. Pinion

mounting distance adjustments
are
made through the
use

of shims,
as are the
differential bearing pre-load
and

backlash adjustments.
The
differential side gears drive

two splined yokes which
are
retained laterally
by
snap

rings located on the yoke splined end. The yokes
are
sup-

ported on caged needle bearings pressed into
the
carrier,

adjacent
to the
differential bearings.
A
lip seal, pressed

in outboard
of
the bearings, prevents
oil
leakage and dirt

entry.
The
carrier cover
is
bolted
to the
carrier and

provides accessibility
to the
internal parts.
The
cover

incorporates two integral, reinforced mounting pads which

serve
as the
carrier attaching point
to the
suspension

crossmember,
and an
attaching point
for the
spring

center section. The filler plug
is
located on the right side

of the cover near the bolting flange.

All service operations allow carrier removal without

removing
the
carrier cover. Cover removal
is
not nec-

essary
in any of the
service procedures except
in
the

case
of
complete carrier housing replacement,
as the

carrier and cover
are
serviced
as
an assembly.

CHEVROLET CHASSIS SERVICE MANUAL

REAR SUSPENSION AND DRIVE LINE 4-27

SHIM AND

SERVICE

12

14

Fig.
72—Rear Axle Cross-Section (Chevrolet, Camaro, Chevelle and Chevy II)

1.
Companion Flange

2.
Deflector

3. Pinion Oil Seal

4.
Pinion Front Bearing

5. Pinion Bearing Spacer

6. Differential Carrier

LUBRICANT
7. Differential Case

8. Shim

9. Gasket

10.
Differential Bearing

11.
"Clock

12. Pinion Shaft Lock Bolt
13.
Cover

14.
Pinion Shaft

15.
Ring Gear

16.
Side Gear

17.
Bearing Cap

18.
Axle Shaft
19.
Thrust Washer

20.
Differential Pinion

21.
Shim

22.
Pinion Rear Bearing

23.
Drive Pinion

MAINTENANCE AND ADJUSTMENTS

The lubricant level should be periodically checked and

maintained at level of filler plug with a warm axle. See

the lubrication section of this manual for lubricant

recommendations.

Lubricant Leaks

Lubricant leaks should be checked for at the pinion

flange oil seal, axle wheel bearing seals, lubricant-filler
plug, and carrier cover. Correction of these leaks con-

sists of replacing the defective seals or gaskets involved

as described in this section.

AXLE BOLTS AND WHEEL NUTS

From a safety standpoint, axle housing to rear spring

bolts,
wheel nuts and control arm attaching bolts should

be periodically inspected for secure installation.

CHEVROLET CHASSIS SERVICE MANUAL

REAR SUSPENSION AND DRIVE LINE 4-37

9. Connect spring end link bolts as outlined under

Spring--Installation, in this section.

10.
Remove filler plug, located on right side of cover,

and fill -with hypoid lubricant to level of filler hole.

11.
Lower vehicle and road test for leaks, noise and

general performance.

POSITRACTION DIFFERENTIAL UNIT

The optionally available Positraction differential unit

is installed in the conventional carrier to replace the

standard differential unit.

Service procedures for the Positraction equipped axle

are the same as on a conventional axle except for the.

operations listed below.

On the Vehicle Check

If vehicle is equipped with a manual transmission, shift

transmission into neutral.

1.
Raise rear of vehicle until wheels are off the ground,

remove one wheel and tire assembly.

2.
Attach Adapter J-5748 to axle shaft flange and install

a
1/2-13
bolt into adapter (fig. 97).

3.
With wheel and tire assembly still on vehicle held

firmly to prevent turning, measure torque required
Fig.
97—Measuring Positraction Rotating Torque

to rotate opposite axle shaft with a 0-150# torque

wrench attached to J-5748. Torque should be 70

ft.
lbs. minimum new, and no less than 40 ft. lbs. if

used.

PROPELLER SHAFT AND UNIVERSAL JOINTS

INDEX

Page
Page

General Description 4-37

Component Parts Replacement. 4-38

Propeller Shaft (Dana) 4-38

Removal 4-38

Repairs 4-38
Installation 4-39

Propeller Shaft (Saginaw) 4-40

Removal 4-40

Repairs 4-40

Installation 4-41

GENERAL DESCRIPTION

The one-piece, exposed-type, tubular propeller shaft is

used on all models. The cardon-type universal joints are

of the extended-life design and do not require periodic

maintenance. A splined front yoke on the front end of the

propeller shaft extends into a splined coupling on the

transmission output shaft. This slip joint permits slight

lengthening and shortening of the propeller shaft to com-

pensate for up and down movement of the rear axle
assembly.

A light duty (fig. 98) and a heavy duty (fig. 99) version

of the tubular propeller shaft is used. The heavy-duty

shaft incorporates a damper, as part of the sleeve yoke,

at the transmission end of the shaft. This damper is not

serviced separately—the sleeve and damper (fig. 100)

must be replaced as an assembly.

Two different methods are used to retain the trunnions

Fig.
98—Light-Duty Propeller Shaft Cross-Section (Dana Design)

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES

SECTION 5

CONTENTS OF THIS SECTION

Duo Servo Brakes

Disc Brakes
Page

5-1 Power Brakes

5-24 Special Tools
Page

5-31

5-32

DUO-SERVO BRAKES

INDEX

Page

General Description 5-1

Maintenance and Adjustments 5-3

Hydraulic Brake Fluid .. . 5-3

Bleeding Hydraulic System 5-3

Pressure Bleeding 5-3

Manual Bleeding 5_4

Push Rod to Main Cylinder Clearance 5-5

Hydraulic Brake Lines 5-5

Hydraulic Brake Hose 5-5

Hydraulic Brake Tubing 5-6

Brake Adjustment. .................... 5-7

Service Brake 5-7

Parking Brake 5-8

Component Replacement and Repairs 5-9

Parking Brake - Chevrolet, Chevelle and

Camaro 5^9

Pedal Assembly 5-9

Front Cable ,. . . 5-9

Center Cable 5-9

Rear Cables. . 5-9
Parking Brake - Chevy n 5-9

Lever Assembly 5-9

Idler Lever 5-11

Front Cable 5-11

Rear Cable . . ; 5-12

Parking Brake - Corvette 5-13

Lever Assembly . . . . 5-13

Front Cable 5-14

Rear Cable . . 5-14

Brake Pedal 5-15

Shoes and Linings 5-16

Organic 5-16

Metallic 5-17

Main Cylinder 5-18

Wheel Cylinders 5-21

Anchor Pin 5-22

Front Wheel 5-22

Rear Wheel 5-22

Brake Drums • 5-22

Brake Pipe Distribution and Switch Assembly . . . . . 5-23

Camaro Pressure Regulator Valve 5-23

GENERAL DESCRIPTION

All 1967 models are equipped with a new split brake

system as a safety feature. If a wheel cylinder or brake

line should fail at either the front end or rear end of

the vehicle, the operator can still bring the vehicle to

a controlled stop. The system is designed with separate

hydraulic systems for the front and rear brake using

a dual master cylinder (fig. 1). The design of the master

cylinder is similar to that used on the 1966 Corvette

in that it has two entirely separate reservoirs and outlets

in a common body casting. The front reservoir and outlet

is connected to the front wheel brakes, and the rear

reservoir and outlet is connected to the rear wheel

brakes. Two pistons within the master cylinder receive

mechanical pressure from the brake pedal push rod and

transmit it through the brake lines as hydraulic pressure

to the wheel cylinders. The filler cap is accessible from

inside the engine compartment.

A new brake pipe distribution and switch assembly

is mounted below the main cylinder. The front and rear

hydraulic brake lines are routed from the main cylinder,

through the brake pipe distribution and switch assembly,

to the front and rear brakes as shown in Figure 2. The

switch is wired electrically to the brake alarm indicator

light on the instrument panel. In the event of fluid loss

in either the front or rear brake system the indicator

on the instrument panel will illuminate red. (The indi-
cator will also' be illuminated when the parking brake is

applied.)

On Camaro models equipped with air conditioning, the

rear brake hydraulic line is routed through a pressure

regulator valve mounted on the left frame side rail

(fig. 3). The valve controls the hydraulic pressure to

the rear brakes resulting in the correct pressure balance

between the front and rear hydraulic systems.

The self-adjusting brakes (fig. 4), used on both front

and rear of all models, are the Duo-Servo single anchor

type which utilize the momentum of the vehicle to assist

in the brake application. The self-energizing or
self-

actuating force is applied to both brake shoes at each

wheel in both forward and reverse motion. The brake

shoe linings are bonded to the shoes.

Wheel cylinders are the double piston type permitting

even distribution of pressure to each brake shoe. To

keep out dust and moisture, both ejads of each wheel

cylinder are sealed with a rubber booC The wheel

cylinders have no adjustments.

The Chevrolet, Chevelle, and Camaro parking brakes

have a foot operated ratchet type pedal mounted to the

left of the steering column. A cable assembly connects

the pedal to an intermediate cable by means of an equal-

izer, where the adjustment for the parking brake is

incorporated. The intermediate cable attaches to the

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES
5-3

PRIMARY

SHOE

PAWL
WIRE LINK

OVERRIDE

LEVER

VERRIDE

SPRING

RETURN

SPRING

STAR
WHEEL

Fig.
3—Camaro
Pressure
Regulator
Valve
Fig.
4-Self-Adjusting
Brake

MAINTENANCE AND ADJUSTMENTS

In any service operation it is extremely important

that absolute cleanliness be observed. Any foreign matter

in the hydraulic system will tend to clog the lines, ruin

the rubber cups of the main and wheel cylinders and

cause inefficient operation or even failure of the braking

system. Dirt or grease on a brake lining may cause

that brake to grab first on brake application and fade

out on heavy brake application.

The split system consists basically of two separate

brake systems. When a failure is encountered on either,

the other is adequate to stop the vehicle. If one system

is not functioning, it is normal for the brake pedal lash

and pedal effort to substantially increase. This occurs

because of the design of the master cylinder which

incorporates ah actuating piston for each system. When

the rear system loses fluid and takes in air, its piston

will bottom against the front piston. When the front

system loses fluid and takes in air, its piston will

bottom on the end of the main cylinders body. The loss

of fluid in one of the systems causes an uneven hydraulic

pressure balance between the front and rear systems.

The brake pipe distribution and switch assembly, near

the main cylinder, detects the loss of pressure and il-

luminates the brake alarm indicator light on the instru-

ment panel. The pressure loss is felt at the brake pedal

by an apparent lack of brakes for most of the brake

travel and then, when failed chamber is bottomed, the

pedal will harden.

HYDRAULIC BRAKE FLUID

Use GM Hydraulic Brake Fluid, Supreme No. 11 or

equivalent when servicing brakes. This brake fluid is

satisfactory for any climate and has all the qualities

necessary for proper operation, such as a high boiling

point to prevent vapor lock and the ability to remain

fluid at low temperatures.
In the event that improper fluid has entered the system,

it will be necessary to service the system as follows:

1.
Drain the entire system.

2.
Thoroughly flush the system with clean alcohol,

188
proof,
or a hydraulic system cleaning fluid

such as "Declene".

3.
Replace all rubber parts of the system, including

brake hoses.

4.
Refill the system.

5. Bleed the system.

BLEEDING HYDRAULIC SYSTEM

The hydraulic brake system must be bled whenever

any line has been disconnected or air has in some way

entered the system. A ''spongy" pedal feeling when the

brakes are applied may indicate presence of air in the

system. The system must be absolutely free of air at

all times. Bleeding should be done on the longest line

first; the proper sequence to follow is left rear, right

rear, right front, and left front (fig. 5). Bleeding of

brake system may be performed by one of two methods—

either pressure or manual.

PRESSURE
BLEEDING

1.
Clean all dirt from top of main cylinder and remove

cylinder cover and rubber diaphragm.

2.
Reduce fluid level in main cylinder until reservoirs

are approximately half full.

NOTE:
Make sure brake fluid in bleeder equip-

ment is at operating level and that the. equipment

is capable of exerting 30 to 50 lbs. hydraulic

pressure on the brake system.

3.
Install brake bleeder adapter J-22489 (fig. 6) on

main cylinder. Connect hose from bleeder equipment

to bleeder adapter and open release valve on bleeder

equipment.

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-9

COMPONENT REPLACEMENT AND REPAIRS

PARKING BRAKE-CHEVROLET, CHEVELLE AND

CAMARO (Figs. 19 and 20)

Pedal Assembly

Removal

NOTE:
Remove positive cable from battery to

eliminate the possibility of creating short cir-

cuits under dash.

1.
Place parking brake pedal in released position.

2.
Remove equalizer check nut, and separate cable

stud from equalizer.

3.
Remove two attaching nuts from mounting studs

located in engine compartment.

4.
Remove front cable .ball end from pedal assembly

swivel.

5. Remove pedal assembly to dash brace attaching

screw.

6. Remove pedal assembly by lowering rear slightly

to avoid scratching dash, and pulling, it out of the

firewall.

Installation

1.
Place pedal assembly in position with the two mount-

ing studs protruding through the holes provided in

the firewall.

2.
Install and tighten pedal assembly to dash brace

attaching screw.

3.
Position front cable ball end into pedal assembly

swivel.

4.
Install and tighten two attaching nuts on mounting

studs located in engine compartment.

5. Place
,
equalizer in position on center cable and

insert front cable stud through equalizer and secure

with check nut.

6. Adjust parking brake as outlined under Maintenance

and Adjustments in this section.

7. Connect positive battery cable.

Front Cable

Removal

NOTE:
Remove positive cable from battery to

eliminate the possibility of creating short cir-

cuits under dash.

1.
Place parking brake pedal in released position.

2.
Remove equalizer check nut, and separate cable

, stud from equalizer.

3.
Remove retainer from cable assembly at inner side

of frame rail.

4.
Remove ball end of cable from pedal assembly

swivel.

5. Compress expanded conduit locking fingers at toe

pan arid withdraw cable from car.

6. On Chevelle, if necessary, remove rubber tube

from front cable.

Installation

1.
On Chevelle, if necessary, replace rubber tube

over front cable.

2.
Position cable ball and conduit tip through cutout

in firewall. Make sure conduit locking fingers are

fully expanded and secured in cutout, then position

cable ball into pedal assembly swivel.
3.
Feed stud end of cable through frame rail and se-

cure with retainer on inner side of frame.

4.
Place one check nut on cable stud and insert stud

through equalizer, (make sure center cable is in

position), then place second check nut on stud.

5. Adjust parking brake as outlined in this section.

6. Connect positive battery cable.

Center Cable

Removal

1.
Place parking brake pedal in released position.

2.
Remove equalizer check nut and remove equalizer

from cable.

3.
Remove cable from cable guides.

4.
Disconnect center cable from rear cables at

connectors.

Installation

1.
Install cable ends into rear cable connectors.

2.
Place cable through equalizer and install equalizer

on to front cable stud, secure with check nut. (Do

not tighten.)

3.
Install cable in cable guides (figs. 19 and 20),

4.
Adjust parking brake as outlined in this section.

Rear Cables

Removal

1.
Place parking brake pedal in released position.

2.
Remove equalizer check nut and remove equalizer

from cable.

3.
Remove rear cable from connector.

4.
Remove retainer from rear cable at frame bracket.

Pull cable out of bracket.

5. Remove rear brake drum as outlined in this section.

6. Remove rear brake shoes as outlined in this section.

7. Remove cable end from parking brake actuating

lever.

8. Compress expanded conduit locking fingers at flange

plate entry hole and withdraw cable.

Installation

1.
Pass end of cable and conduit tip through flange

plate entry hole, making sure that conduit locking

fingers all expand fully.

2.
Connect cable end to actuating lever.

3.
Install rear brake shoes, drum and wheel as out-

lined in this section.

4.
Pass cable through frame bracket and install

retainer.

5. Install cable end into cable connector.

6. Position equalizer on center cable and place on

front cable stud, secure with check nut.

7. Make sure all center cable guides are in place

and adjust parking brake as outlined in this section.

PARKING BRAKE-CHEVY II (Fig. 21)

Lever Assembly

Removal

NOTE:
Remove positive cable from battery

to eliminate possibility of creating short cir-

cuits under dash.

CHEVROLET CHASSIS SERVICE MANUAL

BRAKES 5-11

VIEW A

VIEWB

CAMARO

Fig.
20—Parking Brake System—Camano

1.
Place parking brake lever in released position.

2.
Remove return spring at equalizer.

3.
Remove equalizer check nut, and separate cable

stud from equalizer.

4.
Remove clevis pin clip and pin from idler lever

assembly.

5. Remove two lever dash attaching screws, and remove

lever assembly from vehicle.

Installation

1.
Place lever assembly into position and secure with

the two lever to dash attaching screws.

2.
Place idler lever in position with lever assembly,

align holes and install clevis pin and clip.

3.
Position equalizer on front cable stud and secure

with check nut.

4.
Install return spring at equalizer.

5. Adjust parking brake as outlined under Maintenance

and Adjustments in this section.

6. Connect positive battery cable.

Idler Lever

Removal

NOTE:
Remove positive cable from battery

to eliminate possibility of creating short cir-

cuits under dash.

1.
Place parking brake lever in released' position.
2.
Eemove return spring at equalizer.

3.
Remove equalizer check nut, and separate cable stud

from equalizer.

4.
Remove clevis pin clip and pin from idler lever

assembly.

5. Remove cable ball from idler lever.

6. Remove pivot pin clip and pivot pin, then remove

idler lever from vehicle.

Installation

1.
Place, idler lever into position and secure with

the pivot pin and clip.

2.
Connect cable ball to idler lever.

3.
Place idler lever in position with lever assembly,

align holes and install clevis pin and clip.

4.
Position equalizer on front cable stud and secure

with check nut.

5. Install return spring at equalizer.

6. Adjust parking brake as outlined under Maintenance

and Adjustments in this section.

7. Connect positive battery cable.

Front Cable

Removal

NOTE:
Remove positive cable from battery

to eliminate possibility of creating short cir-

cuits under dash.

1.
Place parking brake lever in released position.

CHEVROLET CHASSIS SERVICE MANUAL