1967 CHEVROLET CAMARO transmission

ACCESSORIES 15-2

GENERAL DESCRIPTION

The Cruise Master is a speed control system which

employs engine manifold vacuum to power the throttle

Servo unit. The Servo moves the throttle when speed

adjustment is necessary by receiving a varying amount

of bleed air from the Regulator unit. The Regulator

varies the amount of bleed air through a valve system

which is linked to a speedometer-like mechanism. The

speedometer cable from the transmission drives the

Regulator, and a cable from the Regulator drives the

instrument panel speedometer. The. engagement of the
Regulator unit is controlled by an Engagement Switch

located at the end of the turn signal lever. Two brake

release switches are provided: an Electric Switch dis-

engages the Regulator unit and a Vacuum Switch de-

creases the vacuum in the Servo unit to quickly return

the throttle to idle position.

The operation of each unit of the system and the

operation of the entire system under various circum-

stances is described below. Figure 1 shows the location

of the system components within the vehicle-

COMPONENT OPERATION

ENGAGEMENT SWITCH

This switch, located within the turn signal knob, has

three positions. In the fully released position, the switch

passes current through resistance wire to effect a "hold

in" magnetic field in the Regulator solenoid. This cur-

rent is sufficient only to hold the solenoid in place once

it has been actuated by the "pull in" circuit. Depressing

the button partially allows current to flow to the Regu-

lator solenoid at full voltage which causes the solenoid

to pull in. Depressing the button fully opens the circuit

to both the resistance and standard solenoid feed wires

and the solenoid becomes de-activated.

During vehicle operation the three switch positions

have the following functions:

Released

a. System not engaged: No function of the system

will occur although a small current is flowing

through the solenoid via the resistance wire (at

vehicle speeds over 20 mph).

b.
System engaged: The small current flowing

through the resistance wire is holding the solenoid

in the engaged position.

^r-WIRE RELIEF LUG

1 ^-#2-BLUE WIRE

L'3.BLACK WIRE
X /-TURN SIGNAL LEVER

SWITCH—^
^SN

RETAINING RING-^ %^

BUTTON -^

Fig.
2 - Cruise Master Engagement Switch
Partially Depressed

Full voltage is applied to the solenoid (vehicle speed

over 20 mph) which sets the Regulator to maintain the

vehicle speed at the time of Regulator engagement.

Fully Depressed

No electricity flows to the solenoid and the Regulator

is inactive. This position is used by the driver when he

desires to raise or lower his controlled speed. He may

accelerate to his new speed, press the button fully (Regu-

lator releases previously set speed) and release the but-

ton. Upon releasing the button, it passes through the

partially depressed position and the solenoid is "pulled

in", then into released position which provides "hold in"-

current. The driver may also press the button fully with

no pressure on the accelerator pedal. In this case the

regulator releases control of the throttle which returns

to idle and the car slows. When the button is released

the solenoid is pulled in and held in respectively and the

regulator resumes speed control at the speed of the

vehicle during the moment of button release (at vehicle

speeds over 20 mph).

LOCK
NUT

ORIFICE
TUBE

AND
CONNECTOR

ASSEMBLY

AIR FILTER AND

SOLENOID HOUSING COVER

Fig. 3 - Regulator Unit

CHEVROLET CHASSIS SERVICE MANUAL

ACCESSORIES 15-4

Fig. 5 - Servo Mounting

and the air bled into the chamber again equals the air

bled out. A balance occurs again with the diaphragm in

a new position. If the Regulator begins to supply more

bleed air, (vehicle speed increasing) the vacuum in the

chamber drops and the diaphragm moves away from the

vacuum port, withdrawing the tapered needle from the

orifice and enlarging it. Since the vacuum orifice is

now larger, the greater quantity of air being bled into

the chamber may be bled out by vacuum and a balance

again occurs with the diaphragm in a new position.

AIR

TO SERVO

VACUUM

TO SERVO
VACUUM

RELEASE

SWITCH

ELEaRIC

RELEASE

SWITCH

Fig.
6- Servo, Regulator and Hose
Fig. 7 - Release Switches and Brackets

REGULATOR

The Regulator is a device which has two primary

functions: First, it is a vacuum switch which, when en-

gaged by the driver, supplies engine manifold vacuum to

the Servo. Second, it meters a small variable quantity

of air to the Servo unit in order to change the carburetor

throttle opening to effect speed control. A secondary

function of the Regulator is to drive the speedometer.

Since the car speed is sensed by a speedometer-like

mechanism within the unit, the speedometer cable from

the transmission drives the Regulator which drives a

second cable (at a one to one ratio) to the speedometer.

The Regulator is electrically engaged and disengaged

through operation of the Engagement Switch and the

Electric Brake Release Switch. It has two sub-assem-

blies which make up the unit: one being the magnetic

speed sensing assembly and the other being the solenoid

actuated vacuum switch, air bleed and filter, and low

limit speed switch assembly (fig. 8 and 9).

Magnetic Speed Sensing Assembly

The speed sensing assembly operates in the same man-

ner as a speedometer unit except that instead of rotating

a needle through an angle proportional to the vehicle

speed, it rotates a rubber drum which is clutched to the

air bleed valve when the system is in operation. The

assembly is driven by the speedometer cable from the

transmission which turns a disk shaped ferrite magnet.

Facing the magnetic disk is the driven brass disk mounted

on a shaft with the rubber drum mounted on the same

shaft. A spiral hairspring connects the shaft to the

housing and allows it to rotate through an angle which is

proportional to car speed. If the car doubled its speed,

the shaft would rotate to twice its previous angle as may

be seen by noting the operation of a speedometer. The

CHEVROLET CHASSIS SERVICE MANUAL

ACCESSORIES
15-6

port thereby supplying vacuum to the Servo unit.

During system operation
the
following events occur:

1.
Car
speed below
20
mph—no function
of the
unit

because
the
rubber drum
has
not rotated
far
enough

to close
the
solenoid points.
No
energizing current

can flow through the solenoid coil.

2.
Car
speed above
20
mph—The tang
on the
rubber

drum
has
closed
the
solenoid points
and
current
is

flowing through
the 40 ohm
resistance wire
to the

solenoid coil. This current
is
not sufficient to "pull

in", the solenoid.

3.
Driver partially presses Engagement Switch—full

voltage flows through
the
solenoid
to
pull
it
into

operation. Solenoid
cam
tension
on the "U"
clip
is

released and the clip grips the rubber drum. Simul-

taneously the vacuum switch operates; applying man-

ifold vacuum
to the
Servo unit which tightens
the

throttle chain. When
the
driver releases pressure

from
the
accelerator pedal
the
unit will position the

throttle
to
maintain the speed
at
the time
of
solenoid
operation.

Driver releases
the
Engagement Switch—current

flows
to the
solenoid through
the 40
ohm wire and

since the solenoid is "pulled in", the reduced current

flow
is
sufficient to hold
it
in position.

The
car
begins
to
ascend
a
hill—car speed drops

slightly (very slightly) and the magnetic force on the

driven disk
of the
speed sensor
is
decreased.
The

disk rotates slightly
(as
would
a
speedometer shaft

because
of
hairspring tension) turning
the
rubber

drum. Since
the "U"
clip
is
gripping
the
drum,
it

moves
the
slide which COVERS
the air
bleed ports

more. With less air bleeding into the Servo, greater

vacuum exists
in it
and the diaphragm moves toward

the vacuum port opening
the
throttle wider.
The

tapered needle moves into the orifice further and the

diaphragm balances
in a
new position with the wider

throttle opening.
Car
speed
has
been maintained

automatically.

1.
Speedometer Cable

Adapter (From

Transmission)

2.
Gasket

3. Speedometer Cable

Adapter
(To

Speedometer)

4.
Adapter
and
Magnet

Housing

5. Rotating Magnet

6. Helical Ramp
7. Field Plate Adjusting

Pinion

8. Adjusting Pinion

Locating Spring

9. Brass Magnetically

Driven Disk

10.
Field Plate

11.
Hair Spring

12.
Hair Spring Keeper

13.
Rubber Drum

Tang
14.
Rubber Drum

1$.
"U"
Shaped Clutch

Spring

16.
Air
Bleed Sleeve

17.
Orifice Tube

18.
Orifice

19.
Orifice Tube Locknut

20.
Clutch
and
Solenoid

Housing

21.
Vacuum Supply Port

(To Servo)
22.
Vacuum Port (To

Intake Manifold)

23.
Vacuum Valve Slide

24.
Solenoid Coil

25.
Solenoid Plunger

Return Spring

26.
Solenoid Cover Gasket

27.
Air Filter

28.
Solenoid Cover

29.
Air Inlets

Fig.
9-
Regulator
-
Exploded

CHEVROLET CHASSIS SERVICE MANUAL

SPECIFICATIONS 3

REAR SUSPENSION

REAR AXLE

SECTION 4

CHEVROLET, CAMARO, CHEVELLE AND CHEVY II

Gear Backlash . . (.005"-.008" preferred) .003"-.010"

Pinion Bearing Preload (in. lbs.)

New 20-30

Used . 5-15

Lubricant Capacity

Large Carrier 4-1/2 pints

Small Carrier 3-1/2 pints

Bolt Torques (Ft Lbs.)

Carrier Cover 20

Ring Gear 50

Differential Bearing Caps 55

Filler Plug . . 20

Differential Pinion Lock . 20
CORVETTE

Gear Backlash . (.
005"-,
008"
preferred). . .003"-.010"

Pinion Bearing Preload (in. lbs.)

New 20-25

Used 5-15

Lubricant Capacity 3-3/4 pints

Bolt Torques (Ft Lbs.)

Carrier Cover 50

Ring Gear . 50

Differential Bearing Caps . 55

Filler Plug 20

Differential Pinion Lock 20

Type

Heavy Duty Axle

Light Duty Axle

Bolt Torque (ft lbs.)

Spring Retainer

Control Arm Upper

Front Bracket

Upper Bushings

Lower Bushings

Shock Absorber

Upper Nut

Upper Bracket

Lower Nut

Spring Shackle

Front

Rear

Tie Rod

Attaching Nuts

Stud to Axle Bracket

Universal Joint

Companion Flange

Transmission Yoke

Wheel Stud Nuts

Axle Drive Shaft

to Spindle

to Yoke
Chevrolet

4-Link
System

3-Link
System

25

55

70

110

15

65

65

110

15

65
Chevelle

4-Link
System

80

80

12

65

15

65
Chevy H

Semi-Elliptic

Tapered

Single Leaf

40

10

10

50

55

50

15

65
Camaro*

Semi-Elliptic

Tapered

Single Leaf

50

8

10

45

100

50

15

65
Corvette

Independent

Three-Link

System

65

50

35

15

15

75

75

15

@ Station Wagon all
4-Link
System

CHEVROLET a
SfRVK

CARTER
HOLLEY

Carburetor
One Barrel
YF
Four Barrel 4150

Four Barrel
4160
Two Barrel
2100

Prim.
Sec.
Prim,

Engine Displacement

(Horsepower)
153
250
194

230

250
230

250
194
327

(325)
427

(425)
327

(325
396

(350)
327

(300)

327

(350)
427

(390)
396

(350)
327

(300)

327

(350)
427

(390)
427

(400)

427

(435)
427

(400)

427

(435)
427

(400)

Transmission
Auto.
Syn.

Auto.
Syn.

Auto.
Syn.

Syn.

Syn.
Syn.
Syn.
Auto.

Syn.

All
Syn.

Auto.
Syn.

All
All
Syn.

All
Auto.

Part Number

(Mfg. Number)

i

I
sf

i
CO

52
2

1

8

Float

Level
Mechan-

ical
Primary
7/32"
.170"
.350"

170"
.350'

Secondary
.300"

.450'
.300'

Final
Use Sight Plug
Use Sight Plug

Float Drip
1-3/16"

Accelerator Pump

.015"

Idle Vent

Mechanical
.065"
.065'

Fast Idle
.025"
.035*
.025'

Final
2200
RPM
2000

RPM
2200
RPM
2000

RPM
2200
RPM

Choke, Vacuum Break
.220"
.240" .220"
.240"
,240f

.190"
.350'

.190'
.175'
.190"
.175"
.175'
,175f
.250"
.250"

Choke Unloader
.250"

.265"
.350"
.265"
.275'

.275"

Thermostat Choke
Rod
1/2
to 1 Rod
Diameter Interference

Secondary Stop
1/2 Turn After Contact

Main Meter-

ing
Jet
Primary
.096
.1015
.1015 .1023
.104
,104
#67

Secondary
#74

Metering
Rod
.0645

.047

Throttle Bore
.071

.049
.076

.051
.074

.048
.078

.051

.040
.078

.052

.045
#67

#72
#69

.073
#70

.073
#65

.076
#65

.073
#70

.073
#71

.073
#63

.076
#67

.073
#64
.076 #62

.078

.052

.045

Primary
1-11/16"
1-9/16

Secondary
1-9/16
1-3/4

1-3/4
1-9/16

1-9/16
1-1/2 1-3/4
1-1/2

i

With
Air
Injection Reactor System

#74
-
Choke Side.
#78 -
Throttle Lever Side

#82
-
Choke Side,
#80 -
Throttle Lever Side

Carburetor
One Barrel
BV
ROCHESTER

Two Barrel
2GV

©
Quadra-Jet Four Barrel
4MV

©

Engine Displacement

(Horsepower)
194
194
230
230
250
250
283

327

(210)
283

327

(210)
283

327

(210)
283

327

(210)
283

327

(210)
283

327

(210)
283

327

(210)
283

327

(210)
327

(275)

350

(295)
327

(275)

350

(295)
396

(325)

427

(385)
(325)

427

(385)
327

(275)

350

(295)
327

(275)

350

(295)
396

(325)

427

(385)
396

(325)

427

(385)

Transmission
Auto
Syn.
Auto.
Syn.
Auto.
Syn.
Auto.
Syn.
Auto.
Syn.
Auto.
Auto.
Syn.
Auto,
Syn.
Auto,
Syn.
Auto.
Syn.
Auto.
Syn.

Part Number
to

•g

Float Level
1-9/32"

3/4"
9/32"

Float Drop
1-3/4"

1-3/4"

Accelerator Pump
1-1/8'
13/32"
Inner Hole

Idle Vent
.050'
3/8'

Fast Idle
Mechanical
3 Turns After Contact

Running
2200
RPM
2000
RPM
2200
RPM
2200
RPM

Carburetor Choke
Rod
90"
.100"
.90"
.100"
.90'
.100'
.060'

.100"

Choke Vacuum Break
140"
160"
.140" .160" .140" .160"

.110"
.120" .110" .120" .110" .130" .110
,130'
160"
.200"
.160" .240'

.160'
.200"
.16(F .240'

Choke Unloader
.350"

.215"
.260"
.300"

.260'
.300"

Thermostat Choke Rod
1/2 to 1 Rod Diameter Interference
1/2 to 1 Rod Diameter Interference

Air Valve Spring
7/8 Turn

Air Valve Lockout
.015"
(Auto. Trans. Only)

Secondary Opening
75%
Min. Contact (Syn. Trans. Only)

Secondary Lockout
.010"
(Syn.
Trans. Only)

Main Meter-

ing
Jet
Primary
059"

.060'
.058"
.059"

.058"
.060"

.052"
.054"

.052"
.054"
.052"

.054'
.052"
.054'
.071'

Throttle

Bore
Primary
1-9/16"
1-7/16"
1-3/8"

Secondary
2-1/4"

Air Valve Dashpot
.015"

With
Air
Injection Reactor System

With
Air
Conditioning

SPECIFICATIONS
12

TUNE UP CHART

E

N

G

I

N

E
Type

Displacement

Horsepower

Compression ®

srp

;•

D

S

R

I

B

TT

T

o

R
Make

0.

Number
Standard

Cold

Gap

Point Dwell

Point Gap

1 ,

Arm Spring Tension

Condenser

T

I

M

j

N

G ®

Drive

Belts
Exc.

A.I.R.

AXR.
Syn.

Auto.

Syn;

Auto.

Fan & P/S

A/C Compressor

A.LR. Pump

Air Cleaner

Valve

Lash

Idle

<§>

Fuel.

Pump
Inlet
Exhaust
<§)

Exc.

A.LR.

A.LR.
Syn.

Auto.

Syn.

Auto.

Pressure

Volume

Crankcase Vent
In Line

153

90
194

120
230

140
250

155

130

AC

AC

31° -
46N

44N

• 34°
V8

283

195

150

AC 45

AC 44
327

210
275
300

160
325
350

150
350

295
396

325

350
427

385

390
400

160

AC 44

AC 43
425
435

150

AC 43N

AC C42N

.035

28° - 32°

.4)16"
(Used) .019" (New)
<

19 - 23 Ounces

4°B

4°B
4°B

4°B

2°B

4°B
4°B

4°B

4°B

4°B
28

- 32 (
yz.

19 - 23 oz.

.18 - .23 Microfarad

4°B

4°B

4°B

4ftB
4°B

4°B

0°B

4°B

50 lb. Min. 75

65 Jh. Min. 95

35 lb..Min. 5£

500
2°B

2°B

2°B

2°B
8PB

8°B

6°B'

6°B
6°B

6°B

6°B

4°A
10°B

X

ib°B

X
10PB

X

10°B

X
4°B

4°B

4°B

4°B
4°B

4°B

4°B

4°B
4°B

4°B

4°B

4°B

± 5 lbs.
(Used):
125 ± 5 lbs. (New) Using Strand '

± 5 lbs.. (Used) 140 ± 5 lbs. (New) Using Strand '

>
± 5 lbs. (Used) 75 ± 5 lbs. (New) Using Strand r

Hydraulic - One Turn Down From Zero Lash

Hydraulic - One Turn Down From Zero Lash

500

X
700*

600*

3 to
700*

500*

4-1/2
500

600
500

500

700*

600*
700

750
500

500

700

500
500

500

700

500
550

550

700

500
4°B

4°B

4°B

4°B
4°B

4°B

4°B

4°B
4°B

4°B

4°B

4°B

Tension Gauge

Tension Gauge

Tension Gauge

550

550

700

550
550

550

700

550
550

550

750

600
10°B
5°B

X

X

.022"

.024"

1000

X

X

X
.024"

.028"

750

X

750

X

5 to 6-1/2

One Pint in 30 - 45 Seconds

Service at 12,000 Miles

OD Psi at cranking speed, throttle wide open - Maximum variation, 20 lbs. between cylinders.

© At idle speed with vacuum advance line disconnected and plugged. A = A.T.D.C.; B = B.T.D.C.

® Paper Element - Service at 12,000 miles initially - Check every 6,000 miles thereafter, until replaced.

Polyurethane - Service every 12,000 miles.

Oil Bath - Change oil at regular engine oil change intervals.

® Mechanical - Set with engine at operating temperature and running.

@ Automatic Transmission - Set idle with transmission in drive.

Air Conditioned Vehicles - Set idle with air conditioning turned "ON" except on specifications indicated by *.

CHEVROLET CHASSIS SERVICE MANUAL

SPECIFICATIONS 17

TRANSMISSION AND CLUTCH

SECTION 7

THREE SPEED (SAGINAW)

Clutch Gear Retainer to Case Bolts 22 ft lbs.

Side Cover to Case Bolts . . 22 ft lbs.

Extension to Case Bolts (except overdrive) . . . . 45 ft lbs.

Overdrive Attaching Lower Left Hand Bolt (Marked X) . 30 ft lbs.

Shift Lever to Shifter Shaft Bolts 20 ft lbs.

Lubrication Filler Plug . . . . 15 ft lbs.

Transmission Case to Clutch Housing Bolts 55 ft lbs.

Crossmember to Frame Nuts . . • 25 ft lbs.

Crossmember to Mount and Mount to Extension Bolts 40 ft lbs.

THREE SPEED (WARNER)

Clutch Gear Retainer to Case Bolts . t . . . 20 ft lbs.

Side Cover to Case Bolts 20 ft lbs.

Extension to Case Bolts . . 40 ft lbs.

Shift Lever to Shifter Shaft Nut 25 ft lbsi

Lubrication Filler and Drain Plugs 20 ft lbs.

Transmission Case to Clutch Housing Bolts 55 ft lbs.

Crossmember to Frame Nuts 25 ft lbs.

Crossmember to Mount Bolts 40 ft lbs.

FOUR SPEED (SAGINAW)

Clutch Gear Retainer to Case Bolts 22 ft lbs.

Side Cover to Case Bolts 22 ft lbs.

Extension to Case Bolts (except overdrive) ' . : 45 ft lbs.

Shift Lever to Shifter Shaft Bolts 20 ft lbs.

Lubrication Filler Plug . 15 ft lbs.

Transmission Case to Clutch Housing Bolts . 55 ft lbs.

Crossmember to Frame Nuts 25 ft lbs.

Crossmember to Mount and Mount to Extension Bolts 40 ft lbs.

FOUR SPEED (MUNCIE)

Clutch Gear Bearing Retainer to Case Bolts 25 ft lbs.

Cover to Case Bolts . 20 ft lbs.

Extension and Retainer tp Case Bolts-(Upper) . 20 ft lbs.

-(Lower) 30 ft lbs.

Lubrication Filler Plug J 30 ft lbs.

Shift Lever to Shifter Shaft Nut 20 ft lbs.

CHEVROLET CHASSIS SERVICE MANUAL