1969 FORD MUSTANG brake light

04-04-03
Rear Axle
—
Ford Light-Duty (WER)

04-04-03

LOCK BOLT

DIFFERENTIAL PINION SHAFT
E 1596- A

FIG.
2—Differential pinion shaft

and Lock Bolt

AXLE SHAFT

LOCK

E 1597-A

FIG. 3—Removal
and
Installation

of C-Locks
and
Axle Shaft

Carefully remove
any
burrs
or
rough

spots.
Replace worn
or
damaged

parts.
A
brownish yellow color
on the

bearing journal
of the
shaft
is
normal

and
the
shaft need
not be
replaced.

Slight pitting
and
wear
is
also normal.

INSTALLATION

1.
Lightly coat
the
wheel bearing

rollers with axle lubricant. Install
the

bearings
in the
axle housing with
the

tool shown
in Fig. 5. The
bearing

should seat firmly against
the
shoul-

der.

2.
Wipe
all
lubricant from
the oil

seal bore before installing
the
seal.

3.
Inspect
the
original seal
for

nicks,
scuffs
or
abnormal wear,
and

replace
it if
necessary.
The new
seals

are pre-packed with lubricant
and do

not require
an oil
soak before installa-

tion.

4.
Install
the oil
seal with
the
tool

shown
in Fig. 6.
Installation without

the
use of the
proper tool will distort

the seal
and
cause leakage.

5. Replace
the
O-ring
in the
C-lock

groove
on the
axle shaft.

6. Slide
the
axle shaft(s) into place
Tool
-
T66L-12132

Tool
-
7507- 700-A

\

1

T50T-100-A
BEARING

Tool - 766L-72J32-8

(THREAD
REDUCING

ADAPTER PART ONLY)

SEAL

FIG. 4—Removal
of
Axle Seal
or

in
the
axle housing. Exercise care that

splines
or any
portion
of the
axle

shaft(s)
do not
damage
the oil
seal(s)

and that they engage with
the
splines

of
the
differential side gear(s).

7. Install
the
axle shaft C-lock(s)

on
the
inner
end of the
shaft(s)
(Fig.

3)
and
push
the
shaft(s) outward
so

that
the
shaft locks seat
in the
conter-

bore(s)
of the
differential side gear(s).

8. Position
the
differential pinion

gears
and
thrust washers
180
degrees

apart
to the
differential side gears.

Revolve
the
gear assembly until
the

holes
in the
differential case
are a-

ligned with the pinion gears.

9. Position
the
differential pinion

shaft through
the
case
and
pinions,
a-

ligning
the
hole
in the
shaft with
the

lock bolt hole. Install
the
lock bolt

Tool
-
760K-7697.fi
E 1598.A

Axle Bearing

and torque
it to
specification.

10.
Install
the
brake drum
and

tighten
the
attaching (Tinnerman)

nuts.

11.
Install
the
wheel
and
tire
on the

brake drum.

12.
Clean
the
gasket mounting
sur-

faces
of the
rear axle differential

housing
and the
cover. Install
a new

cover gasket, cover
and the
attaching

bolts.
Torque
the
bolts
to
specifica-

tion.

13.
Raise
the
rear axle. Make sure

the rear axle
is in
running position.

Add
the
amount
of
specified lubricant

required
to
reach
to the
bottom
of the

filler plug hole. Install
the
filler plug

and torque
it to
specification.

14.
Remove
the
safety support

stands
and
lower
the
vehicle.

7oo/

765F-7 777-A

E 1571-A

FIG. 5—Installation
of
Axle

Shaft Bearing
FIG.
6—Rear
Axle Shaft Bearing

Seal Installationprocarmanuals.com

04-04-04
Rear Axle — Ford Light-Duty (WER)

04-04-04

REMOVAL AND INSTALLATION

AXLE HOUSING

Refer to Fig. 7.

REMOVAL

1.
Raise the vehicle on a hoist.

2.
Remove the wheels and tires

from the brake drums.

3.
Position a drain pan and loosen

the rear axle cover to housing attach-

ing bolts. Drain the housing.

4.
Remove the attaching (Tinner-

man) nuts that secure the brake drums

to the axle shaft flanges, and then re-

move the drums (Fig. 7).

5.
Remove the axle housing cover

bolts,
cover and gasket. Discard the

gasket. Remove the drain pan.

6. Disconnect the drive shaft at the

drive pinion companion flange. Re-

move the drive shaft from the trans-

mission extension housing. Install an

oil seal replacer tool in the transmis-

sion housing to prevent leakage. Refer

to the transmission group for the ap-

propriate tool.

7.
Disconnect the lower end of the

shock absorbers at the mounting

brackets.

8. Disconnect the track bar from

the axle housing stud. If the axle

housing is to be replaced, transfer the

stud to the new housing.

9. Position safety stands under the

rear frame members. Lower the vehi-

cle with the hoist and allow the axle

to lower far enough to relieve rear

spring tension.

10.
Remove the pinion shaft lock

bolt and pinion shaft (Fig. 2), differ-

ential pinion gears and thrust washers.

11.
Push the axle shaft(s) inward

toward the center of the axle housing.

Remove the C-locks from the inner

ends of the axles (Fig. 3). Remove the

axle shafts from the housing. Extreme

care must be used to avoid contacting

the axle shaft seal lip with any portion

of the axle shaft other than the seal

journal.

12.
Disconnect the vent hose from

the rear vent tube and remove all

brake lines from the axle housing re-

taining clips.

13.
Remove the brake backing

plate attaching nuts and the plates

from the axle housing. Suspend the

plates above the axle housing with

mechanics wire. The hydraulic brake

lines and the parking brake cables will

remain attached to the brake backing

plates.
14.
Support the rear axle housine

on a jack.

15.
Remove the right and left rear

springs and insulators.

16.
Remove the nuts, washers and

pivot bolts that connect the suspension

lower arms to the axle housing. Dis-

connect both arms from the axle

housing.

17.
Disconnect the upper suspen-

sion arm from the axle housing by re-

moving the pivot bolt, nut, lock wash-

er and two eccentric washers.

18.
Lower the rear axle to the floor

with the jack and remove the axle

from under the vehicle.

19.
Remove the wheel bearings and

oil seals with the tool shown in Fig. 4.

20.
If the axle housing is being re-

placed, transfer all the differential and

pinion parts to the new housing. Refer

to Section 4, Major Repair Operation

for the procedure.

INSTALLATION

1.
Lightly coat the wheel bearing

rollers with axle lubricant. Install

wheel bearings in the axle housing

with the tool shown in Fig. 5. The

bearings should seat firmly against the

shoulder.

2.
Wipe all lubricant from the oil

seal bore before installing the seal. If

axle housing is being replaced, new

seals must be installed.

3.
Inspect the original seal for

nicks,
scuffs or abnormal wear, and

replace if necessary. New seals are

pre-packed with lubricant and do not

require an oil soak.

4.
Install the seal with the tool

shown in Fig. 6. Installation without

the use of the proper tool will distort

the seal and cause leakage.

5. Raise the rear axle into position

under the vehicle with a hoist or floor

jack. Connect the suspension lower

arms to their mounting brackets on

the axle housing with pivot bolts and

nuts.
Do not tighten the mounting

bolts at this point.

6. Position the suspension upper

arm in its mounting bracket on the

axle housing and install the adjusting

bolt, eccentric washers, lock washer

and nut. Do not tighten the mounting

bolt at this point.

7.
Place the rear coil springs and

insulators into position in the pockets

provided.
8. Place the brake backing plates

on the axle housing flanges, install 4

attaching bolts and nuts and torque

them to specifications.

9. Position the brake lines to the

axle housing and secure them with the

retaining clips. If the axle housing is

new, install a new vent. When install-

ing the new axle vent apply a small

amount of Locktite (C5AZ-19554-B)

to prevent oil leakage between vent

and axle housing. Connect the vent

tube to the vent.

10.
Install the pinion side gears and

thrust washer.

11.
Slide the axle shafts into place

in the axle housing. Exercise care that

splines or any portion of the axle

shafts do not damage the oil seals and

that they engage with the splines of

the differential side gears.

12.
Install the axle shaft C-lock O-

ring and C-lock on the inner end of

the shaft and push the shaft outward

so that the shaft lock seats in the

counterbore of the differential side

gear.

13.
Position the pinion differential

gears and thrust washers 180 degrees

apart to the differential side gears.

Revolve the gear assembly until the

holes in the differential case are al-

igned with the pinion gears.

14.
Position the differential pinion

shaft through the case and pinions, al-

igning the hole in the shaft with the

lock bolt hole. Install the lock bolt

and tighten it to specification.

15.
Clean the gasket mounting sur-

face of the rear axle housing and the

cover. Install a new cover gasket,

cover and the attaching bolts. Torque

the bolts to specification.

16.
Raise the rear axle on a hoist

and remove the safety stands.

17.
Connect the track bar to the

mounting stud. Install the washer and

nut. Torque the nut to specification.

18.
Connect the two rear shock ab-

sorbers to the mounting brackets on

the axle housing and torque the at-

taching nuts to specification.

19.
Make sure that both the front

and rear pivot bolts of the upper and

the two lower arms are loose, then

raise the axle assembly to the con-

trolled height (Fig. 8). Hold the axle

at the controlled height by placing

blocks or pieces of steel pipe between

the axle housing and the bumper rear

screw on the side rail.procarmanuals.com

04-04-06
Rear Axle — Ford Light-Duty (WER)

04-04-06

20.
With the axle at controlled

height, torque the suspension upper

and lower arm front pivot bolts and

nuts to specifications. Torque the

lower arm to axle housing pivot bolts

and nuts to specifications.

21.
Remove the oil seal replacer

from the transmission extension hous-

ing. Install the drive shaft in the ex-

tension housing. Align the scribe

marks on the cups, flange and drive

shaft and connect the drive shaft at

the drive pinion flange. Torque the at-

taching bolts to specification
FRAME

TIGHTEN ARM

ATTACHING BOLTS

AT 5-45/64 INCH

HEIGHT POSITION
5-45/64 INCH

HEIGHT FOR

INSTALLATION

OF ARMS

E 1600-B

FIG.8—
Axle
Normal Curb Height

and Controlled Height for Arm

Installation
22.
Install the brake drum and at-

taching (Tinnerman) nuts.

23.
Install the wheel and tire on the

brake drum. Install the wheel covers.

24.
Adjust the drive shaft and pin-

ion angle to specification.

25.
Add the amount of specified lu-

bricant required to reach to the bot-

tom of the filler plug hole. Make sure

the rear axle is in running position.

Install the filler plug and torque it to

specification.

26.
Lower the vehicle.

4 MAJOR REPAIR OPERATIONS

DISASSEMBLY OF AXLE
The rear axle components are

shown in Fig. 9.

DIFFERENTIAL SIDE GEAR

AXLE SHAFT C-WASHER \

DIFFERENTIAL PINION SHAFT

THRUST WASHER

BEARING ASSEMBLY

CUP
THRUST WASHER

^^ DIFFERENTIAL PINION GEAR

BEARING ADJUSTING NUT

DIFFERENTIAL

PINION SHAFT

LOCK BOLT

LOCK WASHER
BOLT

LOCK WASHER

ADJUSTING NUT LOCK

DRIVE GEAR ATTACHING BOLT

BEARING CAP

AXLE HOUSING ASSEMBLY

PINION AND RING GEAR

PINION LOCATING SHIM(S)

BEARING CUP

BOLT

NUT

BEARING CUP

COLLAPSIBLE SPACER

AXLE SHAFT

E 1572-C

FIG. 9—Disassembled Light-Duty (WER) Rear Axleprocarmanuals.com

04-04-07
Rear Axle — Ford Light-Duty (WER)
04-04-07

RUNOUT CHECK

E 1573-A

FIG. 70—Checking Backlash and Runout—Light-Duty (WER) Axle

All service operations on the differ-

ential case assembly can be performed

with the axle housing in the vehicle.

1.
Raise the vehicle on a hoist.

2.
Position the drain pan under the

axle housing. Loosen the housing

cover attaching bolts. Drain the lubri-

cant from the housing.

3.
Make scribe marks on the drive

shaft end yoke and the rear axle shaft

companion flange to insure proper po-

sition of the drive shaft at assembly.

Disconnect the driveshaft from the

rear axle companion flange. Be care-

ful to avoid dropping the loose univer-

sal joint bearing cups. Hold the cups

on the spider with tape. Mark the

cups so that they will be in their origi-

nal position in relation to the flange

when they are reassembled. Remove

the drive shaft from the transmission

extension housing. Install an oil seal

replacer tool in the transmission ex-

tension housing to prevent transmis-

sion leakage. Refer to the transmis-

sion group for the appropriate tool.

4.
Raise the vehicle and place

jack-type stands under the rear frame

crossmember. Lower the vehicle on a

hoist and allow the axle to lower as

far as possible.

5.
Remove the axle housing cover

and gasket. Discard the gasket.

6. Perform the Inspection Before

Disassembly of Carrier procedure.

Refer to Part 4-1, Section 3 of this

Shop Manual.

7.
Remove the attaching (Tinner-

man) nuts that secure the rear brake

drums to the axle shaft flanges, and

then remove the drums.

8. Working through the differential

case opening, remove the pinion shaft

lock bolt and pinion shaft (Fig. 2).

9. Push the axle shafts inward

toward the center of the axle housing.

Remove the C-locks (Fig. 3) from the

inner ends of the rear axles. Remove

the axle shafts from the housing. Ex-

treme care must be used to avoid con-

tacting the axle shaft seal lip with any
portion of the axle shaft except the

seal journal.

10.
Remove the bearings and oil

seals from the axle housing as shown

in Fig. 4.

11.
Remove the pinion side gears

and the side gear thrust washers.

12.
Remove both side bearing ad-

justing nut locks (bolts).

13.
Install a dial indicator (Fig. 10),

and check and record the backlash

and ring gear runout.

14.
Mark one differential bearing

cap and the case to help in positioning

the parts properly during assembly.

15.
Remove the bearing cap retain-

ing bolts. Remove the bearing caps,

cups,
adjusting nuts and case assem-

bly.

16.
Hold the drive pinion flange

and remove the pinion nut (Fig. 11).

Discard the nut.

17.
Remove the pinion flange (Fig.

12).

18.
Drive the pinion out of the

front bearing cone and remove it from

the carrier housing. Remove and dis-

card the bearing spacer.

19.
With a hammer and drift re-

move the pinion shaft oil seal out

through the front of the carrier hous-

ing.

20.
Remove the pinion rear bearing

from the drive pinion shaft (Fig. 13).

21.
Measure the shim which is

found under the bearing cone with a

Tool-T57L-485T-A

or 4851-K

El 906A
Tool
-
T6SL-485UA
\

E 1574-A

FIG. 12—Drive Pinion Flange

Removal

1575-A

FIG. 13—Pinion Rear Bearing

Removal

00/
- T57L-4220-A

FIG. 11—Typical Drive Pinion

Shaft Nut Removal
E 1576-A

FIG. 14—Differential Bearing

Removal

micrometer. Record the thickness of

the shim.

DISASSEMBLY OF

DIFFERENTIAL CASE

1.
If the 2 differential side bearings

are to be removed from the differen-

tial case, use the tool shown in Fig.

14.procarmanuals.com

05-03-03
Clutch
05-03-03

CLUTCH PEDAL

ADJUSTMENTS

Adjust
the
clutch pedal free travel

whenever
the
clutch does
not
disen-

gage properly,
or
when
new
clutch

parts
are
installed. Improper adjust-

ment
of the
clutch pedal
is one of the

most frequent causes
of
clutch failure

and
can be a
contributing factor
in

some transmission failures.

FREE TRAVEL

1.
Disconnect
the
clutch return

spring from
the
release lever.

2.
Loosen
the
release lever
rod

locknut
and
adjusting
nut
(Figs.
1, 2

and
3).

3.
Move
the
clutch release lever

rearward until
the
release bearing

lightly contacts
the
clutch pressure

plate release fingers.

4.
Adjust
the rod
length until
the

rod seats
in the
release lever pocket.

5.
Insert
the
specified feeler gauge

between
the
adjusting
nut and the

swivel sleeve. Then tighten
the
adjust-

ing
nut
against
the
gauge finger tight.

6. Tighten
the
locknut against
the

adjusting
nut,
being careful
not to di-

sturb
the
adjustment. Torque
the
lock-

nut
to
specification
and
remove
the

feeler gauge.

7.
Install
the
clutch return spring.

8. Check
the
free travel
at the
pedal

for conformance
to
specification.
Re-
adjust
if
necessary.

9.
As a
final check, measure
the

pedal free travel with
the
transmission

in neutral
and the
engine running
at

about 3000
rpm. If the
pedal free

travel
at
this speed
is not a
minimum

of
1/2
inch, readjust
the
clutch pedal

free travel. Otherwise,
the
release
fin-

gers
may
contact
the
release bearing

continuously, resulting
in
premature

bearing
and
clutch failure. Free travel

must
be
exactly
to
specification.

CLUTCH ASSIST

SPRING REPLACEMENT

(FAIRLANE, FALCON,

MONTEGO)

1.
Remove
the
cotter
pin
from
the

clutch
rod at the
clutch pedal lever
as-

sembly inside
the
passenger compart-

ment.

2.
Grasp
the
clutch pedal lever

firmly
to
prevent slipping
and
remove

the clutch
rod
from
the
lever. Allow

the clutch pedal lever
to
rest
on the

floor panel.

3.
Remove
the
forward bolt secur-

ing
the
assist spring bracket
to the

brake pedal bracket
and
loosen
the

rear bolt
two or
three turns.
Do not

remove
the
rear bolt.

4.
Grasp
the
assist spring bracket

with pliers
and
rotate upward until
the

spring
can be
separated from
the

bracket.

BRAKE PEDAL

BRACKET

CLUTCH ASSIST SPRING

BRACKET
-
7535

CLUTCH PEDAL

7519
5.
Position
the
assist spring
in the

clutch pedal spring bracket
and the

assist spring bracket. Rotate
the

spring bracket downward until
the

forward bolt holes
in the
assist spring

bracket line
up
with
the
holes
in the

brake pedal bracket
(Fig. 4).

6. Install
the
forward bolt retaining

the assist spring bracket
to the
brake

pedal bracket
and
torque
the
forward

and rear bolts
to
specification.

7.
Install
the
clutch
rod to the

clutch pedal lever
and
insert
the
cotter

pin.

CLUTCH PEDAL, PEDAL

ASSIST SPRING AND/OR

BUSHING REMOVAL

AND INSTALLATION

FORD, MERCURY,

METEOR

1.
Remove
the pin
that secures
the

clutch pedal-to-equalizer
rod to the

clutch pedal.

2.
Grasp
the
clutch pecal lever

firmly
to
prevent slipping
and
remove

the clutch
rod
from
the
lever. Allow

the clutch pedal lever
to
rest
on the

floor.

3.
Loosen
the
lower bolt securing

the assist spring bracket
to the
pedal

support bracket
two or
three turns.

Then, remove
the
upper bolt from
the

bracket.
Do not
remove
the
lower

bolt.

4.
Grasp
the
assist spring bracket

with pliers
and
rotate
it
counterclock-

wise until
the
spring
is
free
(Fig 5).

5.
Remove
the
retaining ring from

the
end of the
clutch pedal shaft. Then

remove
the
shaft, bushings
and
clutch

pedal from
the
support.

6. Remove
the
bushings from
the

pedal shaft
and
pedal support
and

transfer
the
rubber pedal
pad.

7.
After lubricating
the
pedal shaft

ASSIST SPRING

LOWER BOLT

ASSIST SPRING BRACKET-

UPPER
BOL"

C 1769-B

FIG. 4—Clutch Pedal Assembly
—
Fairlane, Montego, Falcon
C2058-A

;. 5—Removing Clutch Assist

Spring
—
Ford,
Mercury and Meteorprocarmanuals.com

05-03-04
Clutch

05-03-04

bushings, position the clutch pedal and

bushings in the pedal support.

8. Install the retaining ring on the

clutch pedal shaft.

9. Position the assist spring in the

pedal support bracket and the assist

spring bracket. Rotate the assist

spring bracket clockwise until the

upper bolt holes line up and install the

bolt. Torque both the upper and lower

bolts to specification.

10.
Check the clutch pedal free

travel and adjust as required.

MUSTANG, COUGAR

1.
Disconnect the battery ground

cable.

2.
Remove the steering column.

Refer to Group 3 of this manual for

the procedure.

3.
Remove the two capscrews re-

taining the master cylinder or booster

to the dash panel. Then remove the

two capscrews retaining the pedal sup-

port bracket to the dash panel.

4.
Working inside the vehicle, dis-

connect the clutch pedal-to-equalizer

rod at the clutch pedal by removing

the retainer and bushing.

5.
Secure the clutch pedal against

the bumper stop with a small C-clamp

as shown in Fig. 6.

6. Disconnect the stop light switch

wires at the connector.

7.
Remove the switch retainer and

slide the stop light switch off the

brake pedal pin just far enough for

the switch outer hole to clear the pin.

Then lower the switch away from the

pin.
Remove the master cylinder push

CLUTCH PEDAL ASSIST SPRING
rod, bushing and nylon washer from

the brake pedal pin.

8. Remove the screw retaining the

pedal support bracket to the top inner

cowl bracket (Fig. 6).

9. Remove the two sheet metal

screws retaining the pedal support

bracket to the dash panel.

10.
Remove the two screws retain-

ing the pedal support bracket to the

upper cowl brace and lower the pedal

support bracket away from the steer-

ing column studs.

11.
Remove the pedal support

bracket assembly from the vehicle.

12.
Mount the bracket in a vise.

13.
Remove the small C-clamp se-

curing the clutch pedal to the bumper.

Slowly pivot the pedal away from the

bumper until the assist spring can be

lifted from its seat.

14.
Remove the retainer clip from

the clutch and brake pedal shaft.

Then, remove the clutch pedal and

shaft assembly, brake pedal assembly,

and bushings from the pedal support

bracket.

15.
Apply a coating of SAE 10 en-

gine oil to the bushings and locate all

bushings in their proper places on the

brake and clutch pedal assemblies.

16.
Position the brake pedal to the

pedal support bracket. Install the

clutch and brake pedal shaft through

the pedal support and brake pedal as-

sembly. Install the retainer.

17.
Install the clutch pedal assist

spring and pivot the pedal against its

bumper stop. Secure the pedal against

the bumper with a small C-clamp as

TOP INNER COWL-TO-BRACKET

RETAINING SCREW

C2057-A

FIG.
6—Clutch
Pedal —Mustang and Couga?
shown in Fig. 6.

18.
Position the pedal support

bracket assembly to the dash panel

and to the steering column retainer

studs.

19.
Align the pedal support bracket

holes with the holes in the dash panel

and install the two sheet metal screws.

20.
Install the two capscrews at-

taching the pedal support bracket to

the upper cowl bracket.

21.
Install the screw attaching the

support bracket to the top inner cowl

bracket (Fig. 6).

22.
Install the inner nylon washer,

bushing master cylinder push rod on

the brake pedal pin. Position the stop

light switch so that it straddles the

push rod with the switch slot on the

pedal pin and the switch outer hole

just clearing the pin. Slide the switch

completely onto the pin, and install

the outer nylon washer. Secure with

the self-locking pin.

23.
Connect the stop light switch

wires to the connector and install the

wires to the retaining clip.

24.
Connect the clutch pedal-

to-equalizer rod to the clutch pedal

assembly with the bushing and retain-

er and remove the C-clamp from the

bracket.

25.
Working from the engine side

of the dash panel, install the two cap-

screws attaching the pedal support

bracket to the dash panel. Then install

the two screws attaching the master

cylinder to the dash panel.

26.
Install the steering column.

Refer to Group 3 of this manual for

the procedure.

27.
Adjust the clutch pedal free

travel.

28.
Check the brake pedal free

height and travel measurements

(Group 2).

29.
Connect the battery ground

cable.

CLUTCH PEDAL AND/OR

BUSHING REMOVAL

AND INSTALLATION

MOM EGO, FALCON

FAIRLANF

1.
Remove the retaining clip (Fig.

2) that secures the equalizer rod to the

clutch pedal. Disconnect the rod from

the pedal.

2.
Remove the lower bolt retaining

the assist spring bracket to the pedal

support. Then, loosen the upper

bracket retaining bolt (approximately

4 turns) and disconnect the spring

from the clutch pedal and bracket.

3.
Disconnect the brake pedal push

rod from the brake pedal.procarmanuals.com

05-03-06
Clutch

05-03-06

8. Remove the starter cable then

remove the starter motor from the fly-

wheel housing.

9. Remove the bolts that secure the

engine rear plate to the front lower

part of the flywheel housing.

10.
Remove the flywheel housing

lower cover (390 CID housing only).

11.
Remove the bolts that attach

the housing to the cylinder block.

12.
Move the housing back just far

enough to clear the pressure plate,

then move it to the right to free the

pivot from the clutch equalizer bar. Be

careful not to disturb the linkage and

assist spring.

13.
Loosen the six pressure plate

cover attaching bolts evenly to release

the spring tension. If the same pres-

sure plate and cover is to be installed

after the clutch is overhauled, mark

the cover and flywheel so that the

pressure plate can be installed in the

same position.

14.
Remove the pressure plate and

the clutch disc from the flywheel.

CLUTCH INSTALLATION

1.
Install the clutch release lever if

it was removed.

2.
Place the clutch disc, and pres-

sure plate assembly in position on the

flywheel. Start the cover attaching

bolts to hold the pieces in place, but

do not tighten them. Avoid touching

the clutch disc facing, dropping the

parts or contaminating them with oil

or grease as clutch chatter may result.

3.
Align the clutch disc with the

tool shown in Fig. 7, and alternately

tighten the bolts a few turns at a time

until they are all tight. Then torque

the six pressure plate cover attaching

bolts to specification before removing

the tool.
4.
Apply a light film of grease

(C3VY-19586-A) to the outside diam-

eter of the transmission front bearing

retainer. Apply a light film of grease

(C3VY-19586-A) to both sides of the

release lever fork where it contacts the

release bearing bore spring clips.

Apply a light film of grease to the re-

lease bearing surface that contacts the

pressure plate release fingers. Fill the

grease groove of the release bearing

hub with lithium base grease (C3VY-

19586-A). Clean all excess grease

from inside the bore of bearing hub.

Excess grease will be forced onto the

spline by the transmission input shaft

bearing retainer and will contaminate

the clutch disc. Also, place the release

bearing and hub on the release lever.

5.
Make certain that the flywheel

housing and the cylinder block mount-

ing surfaces are clean. Position the

felt washer on the pivot in the fly-

wheel housing. Slip the pivot into the

clutch equalizer shaft being careful

not to disturb the linkage and at the

same time position the housing on the

dowels in the cylinder block. Install

and torque the attaching bolts to spec-

ification.

6. Install the starting motor and

connect the cable.

7.
The mounting surfaces of the

transmission and the flywheel housing

must be free of dirt, paint, and burrs.

Install two guide pins in the flywheel

housing lower mounting bolt holes.

Move the transmission forward on the

guide pins until it is tightly positioned

against the flywheel housing.

8. Install the two upper mounting

bolts.
Then, remove the guide pins

and install the two lower mounting

bolts.
Torque all the bolts to specifica-

tion.

9. Raise the rear of the engine and
install the crossmember. Install and

torque the crossmember attaching

bolts to specifications, then lower the

engine.

10.
Install the extension housing-

to-engine rear support attaching bolts.

Torque the bolts to specification.

11.
Remove the transmission jack

and connect the parking brake cable.

12.
If the vehicle is equipped with a

four-speed transmission, connect the

gear shift linkage control bracket to

the extension housing.

13.
Connect the gear shift rods to

the transmission. Adjust the shift link-

age as required.

14.
Connect the release lever retain-

ing spring. Install the flywheel housing

cover (390 CID housing only).

15.
Remove the tool from the

transmission output shaft and install

the drive shaft.

16.
Check the clutch pedal free

travel.

CLUTCH ARBOR CLUTCH DISC

PRESSURE PLATE

C 1788-A

FIG. 7—Installing Clutch Disc —

Typicalprocarmanuals.com

07-01-09

General Transmission Service

07-01-09

For example, on a C4 transmission,

if the pressure at 10 inches of vacuum

was 120 psi and the pressure at 1.0

inch of vacuum was 170 psi, and up-

shifts and downshifts were harsh, a di-

aphragm adjustment to reduce the di-

aphragm assembly spring force would

be required.

If the pressure readings are low, an

adjustment to increase diaphragm

spring force is required.

To increase control pressure, turn

the adjusting screw in clockwise to re-

duce control pressure, back the adjust-

ing screw out by turning it counte-

rclockwise. One complete turn of the

adjusting screw (360 degrees) will

change idle line control pressure ap-

proximately 2-3 psi. After the adjust-

ment is made, install the vacuum line

and make all the pressure checks as

outlined in the Specification Section.

The diaphragm should not be ad-

justed to provide pressure below the

ranges shown in the Specification Sec-

tion in order to change shift feel. To

do so could result in soft or slipping

shift points and damage to the trans-

mission.

ALTITUDE

COMPENSATING TYPE

The altitude—compensating di-

aphragm is provided with an adjust-

ment screw located in the vacuum

connecting tube (Fig. 15). The adjus-

table feature allows control and TV

pressures to be adjusted (within limits)

to correct soft or harsh shift feel.

Control and TV pressures are in-

creased or decreased by turning the

adjusting screw.

Before replacing or adjusting the di-

aphragm, it must first be determined

that the pressure or vacuum is actual-

ly out of specification and that the

cause of the problem is not due to

other items within the transmission or

vacuum connecting lines.

If the tests outlined in the Specifi-
cation Section have been performed

and pressures are within specification

but shift feel is unsatisfactory, or if

the pressure is too high or too low at

10 inches of vacuum, the vacuum di-

aphragm may be adjusted to improve

the shift feel.

If shifts are excessively harsh, the

diaphragm should be adjusted to re-

duce control pressure by backing off

the adjusting screw (counterclock-

wise).
If shift quality is extremely soft,

control pressure should be increased

by turning the adjusting screw inward

(clockwise).

To adjust the vacuum diaphragm to

compensate for harsh shift quality,

first check control pressure in D, 2

and 1 at 10 inches manifold vacuum

and note the pressure reading ob-

tained. Remove the T-fitting from the

vacuum hose and back off the adjust-

ing screw (counterclockwise) by one

full turn. Each full turn will reduce

control pressure by approximately 2

1/2 psi at 10 inches of vacuum. Test

the vehicle for shift feel. If shift quali-

ty is still harsh, a further adjustment

should be made to reduce control

pressure. However, control pressure

should not be reduced below the speci-

fication shown for 10 inches of vacu-

um. If control pressure has been re-

duced to the low limit and shift feel is

still excessively harsh, the clutches and

band should be checked for correct

operation.

To adjust the vacuum diaphragm to

compensate for extremely soft shifts,

record the control pressure reading at

10 inches of vacuum in D, 2 and 1,

then make an initial adjustment of

one full turn inward (clockwise). Test

the vehicle for shift feel and again ad-

just the diaphragm, if necessary. Con-

trol pressure at 10 inches of vacuum

must not exceed the high limit shown

in the Specification Section.

When the necessary adjustments

have been completed and shift feel is

satisfactory, repeat all the tests out-

ADJUSTING

SCREW

PRIMARY

THROTTLE VALVE
DIAPHRAGM

SPRING

D 1639-A

FIG. 15—Altitude Compensating Type Vacuum Diaphragm
lined in the Specification Section. All

tests must be within specifications.

The adjustable vacuum unit must not

be used to allow for adjusting control

or TV pressures that are out of speci-

fications. If these pressures are found

to be out of specifications the cause

must be determined and corrected bef-

ore making any adjustment.

NEUTRAL START SWITCH

ADJUSTMENT AND

REPLACEMENT—COLUMN SHIFT

There are two types of column-

mounted neutral start switches: A and

B.
Type A switch has a parking brake

brake-release vacuum valve. Type B

switches do not have a vacuum valve.

The switches differ in appearance but

not in operation. Both switches are

actuated by a removable steel lever,

which is installed in the shifter tube

within the steering column assembly.

The following procedures outline the

steps necessary to correctly adjust and

replace the neutral start switch.

SWITCH ADJUSTMENT

Neutral Position

1.
With the selector lever held light-

ly against the neutral stop, attempt to

start the engine. If the engine starts

while holding the lever but does not

start when the lever is released, the

shift linkage should be adjusted. If the

engine does not start in either condi-

tion, adjust the switch.

2.
To adjust the switch in neutral,

place the transmission selector lever

against the stop of the neutral detent

position.

3.
Loosen the two retaining screws

that locate the switch on the steering

column (Fig. 16).

4.
With the selector lever against

the neutral stop, rotate the switch

until a start in the neutral position is

obtained. Then, tighten the switch at-

taching screws to 20 in-lbs torque.

5.
With the switch properly adjust-

ed in neutral, place the selector lever

in the 1 position and push the park

reset button (Fig. 16) to the left

(counterclockwise) until it stops. The

park reset must be performed when-

ever the switch has been adjusted.

Park Position

1.
Place the selector lever in the

park position, release the lever and at-

tempt to start. If the engine does not

start, reset the park adjustment.procarmanuals.com