1969 FORD MUSTANG oil

07-02-18
C4 Automatic Transmission

07-02-18

OUTER MANUAL LEVER

MANUAL LEVER LINK

INNER MANUAL LEVER

PARKING PAWL LINK

TOGGLE ROD

PARKING PAWL LINK

FIG. 50—Case Linkage

D1888-A

FIG. 51—Removing Manual

Lever Seal

TOGGLE ROD
D1887-A

12.
Position the inner manual lever

behind the manual lever link, with the

cam on the lever contacting the lower

link pin (Fig. 52).

13.
Install the upper end of the

manual lever link on the case retain-

ing pin. Install the retaining ring.

14.
Operate the manual lever and

check for correct linkage operation.

15.
Install the inner and outer

downshift levers. Torque the attaching

nut to specification.

Bushing Replacement—Case

1.
Remove the transmission case

bushing as shown in Fig. 53.

Press Ram

Handle

MANUAL INNER LEVER

D1890-A

FIG. 52— Inner Manual Lever

Location—As Viewed from the

Control Lever Side of Case
2.
Install the transmission case

bushing with the tool shown in Fig.

53.

Thread Repair-Case

Thread service kits may be pur-

chased from local jobbers or the

Heli-Coil Corporation. To repair a

damaged thread, the following proce-

dures should be carefully followed.

1.
Drill out the damaged threads,

using the same drill size as the thread

01).
For example, use a 5/16-inch

drill for a 5/16-18 thread.

2.
Select the proper special tap and

tap the drilled hole. The tap is marked

for the size of the thread being re-

paired. Thus, the special tap marked

5/16-18 will not cut the same thread

as a standard 5/16-18 tap. It does cut

a thread large enough to accommo-

date the insert, and after the insert is

installed the original thread size

(5/16-18) is restored.

3.
Select the proper coil inserting

tool. These tools are marked with the

thread size being repaired. Place the

insert on the tool and adjust the sleeve

to the length of the insert being used.

Press the insert against the face of

the tapped hole. Turn the tool clock-

wise and wind the insert into the hole

until the insert is 1/2 turn below the

face.

4.
Working through the insert, bend

the insert tang straight up and down

until it breaks off at the notch.

5.
If the inserts are not properly in-

stalled, they can be removed with the

extractor tool. Place the extractor tool

in the insert so that the blade rests

against the top coil 1/4 to 1/2 turn

away from the end of the coil. Tap

the tool sharply with a hammer so

that the blade cuts into the insert.

Press Rom

Handle

Too/
- T66L-7003-B7

Tool - T666-7003-B3

REMOVAL INSTALLATION D 1730-A

FIG. 53—Replacing Transmission Case Bushingprocarmanuals.com

07-02-19
C4 Automatic Transmission

07-02-19

Tool-T64P-7A128-A

OIL

SCREEN
LOWER

VALVE BODY

-,
-^L*«^M*if
GASKET

UPPER

VALVE BODY

D1891-A

FIG. 54—Upper and Lower Valve Bodies Disassembled
MANUAL VALVE

D1892-A

FIG. 56—Removing Manual Valve

Exert downward pressure on the tool

and turn it counterclockwise until the

insert is removed.

CONTROL VALVE BODY

Disassembly

1.
Remove the eight screws that at-

tach the oil screen to the body and re-

move the screen (Fig. 54).

2.
Remove the seven attaching

screws from the underside of the lower

valve body. Separate the lower valve

body, gasket, separator plate and

hold-down plates (Fig. 55) from the

upper valve body. Be careful not to

lose the upper valve body steel ball

shuttle valve and spring when separat-

ing the upper and lower valve bodies.

3.
Depress the manual valve detent

spring with the tool shown in Fig. 56.

Remove the spring retaining pin (roll

SEPARATOR

PLATE
pin) from the upper valve body. Re-

move the spring and detent plunger.

4.
Slide the manual valve out of the

body.

5.
Remove the cut-back and the

back-out valve cover plate from the

valve body (Fig. 57).

6. Remove the cut-back valve from

the body.

7.
Remove the 2-3 back-out valve,

spring and the manual low valve from

the body.

8. Remove the 1-2 shift valve and

2-3 shift valve cover plate from the

valve body.

9. Remove the 2-3 shift valve and

the throttle modulator valve from the

body.

10.
Remove the 1-2 shift valve, D2

valve and the spring from the body.

11.
Remove the intermediate band

accumulator valve cover plate from

the valve body.

RUBBER BALL

SHUTTLE VALVE
SERVO

CHECK VALVE

RUBBER BALL

SHUTTLE VALVE
UPPER VALVE

BODY

D 1726-A

FIG. 55—Separating Upper and Lower Valve Bodies
12.
Remove the intermediate accu-

mulator sleeve, 3-2 control valve,

spring and the intermediate servo ac-

cumulator valve.

13.
Remove the pressure booster

valve, cover plate (Fig. 57).

14.
Remove the pressure booster

valve, sleeve, springs and the main re-

gulator valve.

15.
Remove the spring and the line

pressure coasting boost valve (Fig.

57).

16.
Carefully pry the downshift

valve retainer from the body, then re-

move the spring and valve.

17.
Hold the upper valve body as

shown in Fig. 58 and depress the

throttle booster valve plug to release

the retaining pin. Remove the plug,

valve and the spring.

18.
Remove the two hold-down

plates and the separator plate from

the lower body. Be careful not to lose

the rubber ball shuttle valve when re-

moving the separator plate and gasket

from the lower valve body.

Assembly

1.
Place the rubber ball shuttle

valve in the lower body as shown in

Fig. 55. Position the separator plate

and the two hold-down plates on the

lower valve body and install the four

attaching screws and torque them to

specification.

2.
Place the throttle booster valve

spring, valve (long end into spring)

and the plug (Fig. 57). Depress the

plug and install the retaining pin.

3.
Insert the downshift valve into

the body with the large diameter fac-

ing inward. Install the downshift valve

spring and the retainer (Fig. 57).procarmanuals.com

07-02-21
C4 Automatic Transmission
07-02-21

D1893-A

FIG. 58—Removing or Installing

Throttle Booster Valve

4.
Insert the line pressure coasting

boost valve and spring in the body

(Fig. 57).

5.
Place the main regulator valve in

the body (Fig. 57) with the large di-

ameter facing inward. Install the two

springs and the pressure booster valve

and sleeve.

6. Hold the pressure booster valve

cover plate in place and install the

three attaching screws and torque

them to specification.

7.
Place the intermediate servo ac-

cummulator valve and spring in the

body. Install the interim iiate accum-

mulator sleeve and 3-2 control valve.

Secure the cover to the body with the

attaching screw. Torque the screw to

specifications.

8. Position the spring, D2 valve and

the I-2 shift valve in the body.

9. Place the throttle modulator

valve, spring, and 2-3 shift valve in the

body.

10.
Secure the 1-2 shift valve and

the 2-3 valve cover plate to the body

and torque the screws to specifica-

tions.
11.
Place the manual low valve,

spring, and the 2-3 back-out valve in

the body.

12.
Place the cut-back valve in the

body.

13.
Secure the cut-back and the

back-out cover plate to the body with

two screws. Torque the screws to

specifications.

14.
Slide the manual valve into the

body making sure that the notch for

the manual lever is toward the inside

and that the detent notches are facing

upward.

15.
Place the detent plunger and

spring in the body. Depress the spring

and install a new roll pin.

16.
Position a new rubber check

valve in the upper valve body (Fig.

55).

17.
Position the check valve and

spring in the upper valve body (Fig.

55).
Place a new gasket, the separator

plate and the lower valve body in

place on the upper valve body and se-

cure it with the seven attaching

screws. Torque the screws to specifica-

tions.

18.
Secure the oil screen to the

body with the eight attaching screws.

Torque the screws to specifications.

FRONT PUMP

Disassembly

1.
Remove the four seal rings from

stator support.

2.
Remove the five bolts that attach

the stator support to the front pump

housing. Remove the stator support

from the pump housing (Fig. 59).

3.
Remove the front and rear stator

bushings if they are worn or damaged.

Use the cape chisel (Fig. 60) and cut

along the bushing seam until the chisel
D 1731-A

FIG. 60—Removing Stator

Support Bushing

breaks through the bushing wall. Pry

the loose ends of the bushing up with

an awl and remove the bushing.

4.
Remove the drive and driven

gears from the front pump housing.

5.
Press the bushing from the front

pump housing as shown in Fig. 61.

Assembly

1.
Press a new bushing into the

pump housing with the handle and

tool shown in Fig. 61. Make sure the

bushing is installed with the slot and

groove positioned to the rear of the

pump body and 60 degrees below the

horizontal center line.

2.
Install the drive and driven gears

in the pump housing. Each gear has

an identification mark on the side of

the gear teeth that are chamfered. The

chamfered side with the identification

PUMP HOUSING

STATOR SUPPORT

FRONT PUMP SEAL
SEAL RINGS

SELECTIVE

THRUST WASHERS

GASKET

D 1894-B

59—Front Pump and Stator Support Disassembledprocarmanuals.com

07-02-22

C4 Automatic Transmission

07-02-22

Handle
Fress
Ram
ress
Ram

Hand!

Tool
-
T66L-7003-S9

Too/
-
T66L-7003-B5
INSTALL BUSHING WITH GROOVE

JAND SLOT
IN
THIS POSITION

REMOVAL

INSTALLATION

FIG. 61—Replacing Front Pump Housing Bushing
D 1732-C

mark
has to be
positioned downward

against
the
face
of the
pump housing.

3.
Press
new
bushings into
the sta-

tor support with
the
tool shown
in

Fig. 62.
Use the end
with
the 1/8
inch

step
for the
front bushing
and the end

with
the 1/4
inch step
for the
rear

bushing. When installing
the
rear

bushing,
be
sure
the
hole
in the
bush-

ing
is
lined
up
with
the
lube hole
in

the stator support.

T00I-T66L
Toot-T63L-77837-A

or 77837-A

D 1733
-
A

FIG. 62—Installing Stator

Support Bushings

Tool-T50T-100-A D1895-A

FIG. 63—Removing Front

Pump Seal
D1896-A

FIG. 64—Installing Front

Pump Seal

4.
Place
the
stator support
in the

pump housing
and
install
the
five
at-

taching bolts. Torque
the
bolts
to
spe-

cifications.

5.
Install
the
four seal rings
on the

stator support.
The two
large
oil
rings

are assembled first
in the oil
ring

grooves toward
the
front
of the
stator

support (Fig.
59).

6. Check
the
pump
for
free rotation

by placing
the
pump
on the
converter

drive
hub in its
normal running posi-

tion
and
turning
the
pump housing.

7.
If the
front pump seal must
be

replaced, mount
the
pump
in the

transmission case
and
remove
the
seal

with
the
tool shown
in Fig.
63.
To in-

stall
the new
seal,
use the
tool shown

in
Fig. 64.

REVERSE-HIGH CLUTCH

Disassembly

1.
Remove
the
pressure plate
re-

taining snap ring (Fig.
65).

2.
Remove
the
pressure plate,
and

the drive
and
driven clutch plates (Fig.

66).
If the
composition clutch plates

are
to be
reused,
do not
clean them
in

a vapor degreaser
or
with
a
detergent

solution. Wipe
the
plates with
a
lint-

free cloth.
3.
To
remove
the
piston spring
re-

tainer snap ring, place
the
clutch
hub

in
the
arbor press. With
the
tools

shown
in Fig. 67,
compress
the
piston

return springs
and
remove
the
snap

ring. When
the
arbor press
ram is re-

leased, guide
the
spring retainer
to

clear
the
snap ring groove
of the

drum.

SNAP RING

D1420-A

FIG. 65—Removing
or
Installing

Reverse-High Pressure Plate

Snap Ring

4.
Remove
the
spring retainer
and

10 piston return springs.

5.
Remove
the
piston
by
inserting

air pressure
in the
piston apply hole
of

the clutch
hub
(Fig.
68).

6. Remove
the
piston outer seal

from
the
piston
and the
piston inner

seal from
the
clutch drum (Fig.
66).

7.
Remove
the
drum bushing
if it is

worn
or
damaged.
Use
thw ^ape chisel

(Fig. 69)
and cut a
shallow groove
3/4

inch
in
length along
the
bushing seam

until
the
chisel breaks through
the

bushing wall.
Pry the
loose ends
of

the bushing
up
with
an awl and re-

move
the
bushing.
To
prevent leakageprocarmanuals.com

07-02-26
C4 Automatic Transmission

07-02-26

EXTERNAL SNAP RING

SUN GEAR

THRUST WASHER NO. 5

D1905-A

FIG. 80—Input Shell and Sun Gear Disassembled

4.
If the sun gear bushings are to

be replaced, use the tool shown in Fig.

81 and press both bushings through

the gear.

Tool - T66L-7003-B8

Handle
Tool - T66L-7003-B2

Handle

REMOVAL
INSTALLATION

D 1737-A

FIG. 81—Replacing Sun Gear

Bushing

GEAR

HUB AND FLANGE
D1906-A

FIG. 82—Reverse Ring Gear and

Hub Disassembled
Assembly

1.
Press a new bushing into each

end of the sun gear with the tool

shown in Fig. 81.

2.
Install the internal snap ring on

the sun gear. Install the sun gear in

the input shell.

3.
Install thrust washer No. 5 on

the sun gear and input shell (Fig. 80).

4.
Install the external snap ring on

the sun gear (Fig. 79).

REVERSE RING GEAR

AND HUB

Disassembly

1.
Remove the hub retaining snap

ring from the reverse ring gear.

2.
Remove the hub from the reverse

ring gear (Fig. 82).

Assembly

1.
Install the hub in the reverse ring

gear. Make sure the hub is fully seat-

ed in the groove of the ring gear.

2.
Install the snap ring in the rev-

erse ring gear. Make sure the snap

ring is fully seated in the snap ring

groove of the ring gear.

LOW-REVERSE

BRAKE DRUM BUSHING

REPLACEMENT

1.
Replace the low reverse brake

drum bushing if it is worn or dam-

aged. To remove the bushing, use the

cape chisel and cut along the bushing

seam until the chisel breaks through

the bushing wall. Pry the loose ends
of the bushing up with an awl and re-

move the bushing.

2.
Install a new bushing with the

tool shown in Fig. 83.

Tool -

T66L-7003-B6
Handle

D 1738-A

FIG. 83—Installing Low and

Reverse Brake Drum Bushing

GOVERNOR AND OIL

DISTRIBUTOR

Disassembly

1.
Remove the oil rings from the

governor oil distributor (Fig. 84).

2.
Remove the governor housing-

to-distributor attaching bolts. Remove

the governor from the oil distributor.

Remove the governor oil screen.

3.
Remove the primary governor

valve retaining ring (Fig. 85). Remove

the washer, spring, and primary gov-

ernor valve from the housing.

4.
Remove the secondary governor

valve spring retaining clip, spring, and

governor valve from the housing.

5.
Install the secondary governor

valve in the housing. Install the spring

and retaining clip. Make sure the dip

is installed with the small concaved

area facing downward, to hold the

spring in the correct position.

Assembly

1.
Install the primary governor

valve in the housing. Install the spring,

washer and retaining ring. Make sure

the washer is centered in the housing

on top of the spring and the retaining

ring is fully seated in the ring groove

of the housing.

2.
Install the governor oil screen.

3.
Install the governor assembly on

the oil distributor and torque the at-

taching bolts to specification.procarmanuals.com

07-02-27
C4 Automatic Transmission

07-02-27

'OIL RINGS

SNAP RING

SECONDARY

GOVERNOR VALVE

1 v s

GOVERNOR HOUSING

D1907-A

FIG. 84—Governor and Oil Distributor

4.
Install the oil rings on the distri-

butor. Check the oil rings for free

rotation in the ring grooves on the oil

distributor.

ASSEMBLY OF

TRANSMISSION

When assembling the transmission

sub-assemblies (Fig. 86), make sure

that the correct thrust washer is used

between certain sub-assemblies. Lubri-

cate remaining surfaces with transmis-

sion fluid. Vaseline should be used to

hold the thrust washers in their proper

location. If the end play is not within

PRIMARY GOVERNOR

VALVE AND

LOCK RING

D1908-A

FIG. 85—Removing or Installing

Retaining Ring
specifications after the transmission is

assembled, either the wrong selective

thrust washers were used, or a thrust

washer came out of position during

the transmission assembly operation.

1.
Install thrust washer No. 9 inside

the transmission case (Fig. 87).

2.
Place the one-way clutch outer

race inside the case. From the back of

the case install the six outer race-

to-case attaching bolts. Torque the

bolts to specification with the tools

shown in Fig. 88.

3.
Place the transmission case in a

vertical position with the back face of

the case upward. Install the parking

pawl retaining pin in the case (Fig.

89).

4.
Install the parking pawl on the

case retaining pin. Install the parking

pawl return spring as shown in Fig.

89.

5.
Install thrust washer No. 10 on

the parking gear (Fig. 90). Place the

gear and thrust washer on the back

face of the case (Fig. 89).

6. Place the two distributor tubes in

the governor distributor sleeve. Install

the distributor sleeve on the case. As

the distributor sleeve is installed, the

tubes have to be inserted in the two

holes in the case and the parking pawl

retaining pin has to be inserted in the

alignment hole in the distributor

sleeve.

7.
Install the four governor distrib-

utor sleeve-to-case attaching bolts and

torque the bolts to specification.
8. Install the governor distributor

assembly on the output shaft. Install

the distributor retaining snap ring

(Fig. 40). Figure 91 shows the correct

snap ring to be used.

9. Check the rings in the governor

distributor, making sure the rings are

fully inserted in the ring grooves and

will rotate freely. Install the output

shaft and governor distributor assem-

bly in the distributor sleeve (Fig. 39).

10.
Place a new extension housing

gasket on the case. Install the exten-

sion housing, vacuum tube clip, and

the extension housing-to-case attach-

ing bolts. Torque the bolts to specifi-

cation.

11.
Place the transmission in the

holding fixture with the front pump

mounting face of the case up. Make

sure thrust washer No. 9 is still lo-

cated at the bottom of the transmis-

sion (Fig. 86).

12.
Install the one-wa> clutch

spring retainer into the oui:er race

(Fig. 92).

13.
Install the inner race inside of

the spring retainer.

14.
Install the individual springs be-

tween the inner and outer race as

shown in Fig. 92.

15.
Starting at the back of the

transmission case, install the one-way

clutch rollers by slightly compressing

each spring and positioning the roller

between the spring and the spring re-

tainer.

16.
After the one-way clutch has

been assembled, rotate the inner race

clockwise to center the rollers and

springs. Install the low and reverse

drum (Fig. 86). The splines of the

drum have to engage with the splines

of the one-way clutch inner race.

Check the one-way clutch operation

by rotating the low and reverse drum.

The drum should rotate clockwise but

should not rotate counterclockwise.

17.
Install thrust washer No. 8 on

top of the low and reverse drum (Fig.

93).
Install the low-reverse band in the

case,
with the end of the band for the

small strut toward the low-reverse

servo (Fig. 38).

18.
Install the reverse ring gear and

hub on the output shaft.

19.
Move the output shaft forward

and install the reverse ring gear hub-

to-output shaft retaining ring (Fig. 37).

37).

20.
Place thrust washers Nos. 6 and

7 on the reverse planet carrier (Fig.

94).

21.
Install the planet carrier in the

reverse ring gear and engage the tabs

of the carrier with the slots in the

low-reverse drum.procarmanuals.com

07-02-28

C4
Automatic Transmission

07-02-28

y

Q
!

17

3*1
-
"
-N

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.
CONVERTER

INPUT SHAFT

CONVERTER HOUSING

FRONT PUMP

THRUST WASHER
NO. 1

THRUST WASHER
NO. 2

FRONT PUMP GASKET

INTERMEDIATE BAND

BAND STRUTS

REVERSE
AND
HIGH

CLUTCH DRUM

FORWARD CLUTCH
AND

CYLINDER
12.

13.

14.

15.

16.

17.

18.

19.

20.
THRUST WASHER
NO. 3

FORWARD CLUTCH
HUB

AND RING GEAR

THRUST WASHER
NO. 4

FRONT PLANET CARRIER

INPUT SHELL,
SUN
GEAR

AND THRUST WASHER
NO.

THRUST WASHER
NO. 6

REVERSE PLANET CARRIER

THRUST WASHER
NO. 7

SNAP RING
21.

22.

23.

24.

25.

26.

27.

28.

29.
REVERSEH*ING GEAR

AND
HUB

LOW
AND
REVERSE BAND

BAND STRUTS

THRUST WASHER
NO. 8

LOW
AND
REVERSE DRUM

ONE-WAY CLUTCH

INNER RACE

ROLLER
(12) AND
SPRING
(12)

SPRING
AND
ROLLER CAGE

ONE-WAY CLUTCH OUTER

RACE
30.

31.

32.

33.

34.

35.

36.

37.

38.

39.

40.
THRUST WASHER NO. 9

CASE

THRUST WASHER NO. 10

PARKING GEAR

GOVERNOR DISTRIBUTOR

SLEEVE

SNAP RING

GOVERNOR VALVES
&

DISTRIBUTOR

OUTPUT SHAFT

EXTENSION HOUSING
AND
GASKET

CONTROL VALVE BODY

OIL
PAN AND
GASKET

D 1378-D

FIG.
86—Transmission Sub-Assembliesprocarmanuals.com

07-03-02
FMX Transmission

07-03-02

COMPONENT INDEX

OIL PAN

Assembly

Removal and Installation

OUTPUT SHAFT

Assembly

Inspection

OUTPUT SHAFT BUSHING

Disassembly and Overhaul

PARKING PAWL

Removal and Installation

PRESSURE REGULATOR

Assembly

Disassembly and Overhaul

Inspection

Removal and Installation

PRIMARY SUN GEAR SHAFT

Disassembly and Overhaul

Inspection

REAR BRAKE DRUM SUPPORT BUSHING

Disassembly and Overhaul

REAR CLUTCH

Assembly

Disassembly and Overhaul

Inspection
Page
03-29

03-11

03-26

01-11

03-17

03-13

03-28

03-21

01-16

03-12

03-18

01-11

03-17

03-26

03-18

01-15
REAR SERVO

Assembly

Disassembly and Overhaul

Inspection

Removal and Installation

REAR SUPPORT

Assembly

Inspection

REAR SUPPORT BUSHING

Disassembly and Overhaul

SELECTOR LEVER-CONSOLE SHIFT

Removal and Installation

THROTTLE LINKAGE

Adjustment

Parts Repair or Replacement

TRANSMISSION (Complete)

Removal and Installation

TRANSMISSION CASE BUSHING

Parts Repair or Replacement

TRANSMISSION CASE LINKAGE

Parts Repair or Replacement

VACUUM DIAPHRAGM UNIT

Assembly

Adjustment

Checking
Page
03-28

03-24

01-16

03-12

03-28

03-15

03-21

03-08

03-05

03-05

03-14

03-26

03-25

03-29

01-07

01-04

DESCRIPTION

DESCRIPTION

Figure 1 shows the location of the

converter, front pump, clutches,

bands,
gear train and most of the in-

ternal parts used in the FMX Trans-

mission

The identification tag (Fig. 2) on an

FMX transmission is attached under

the oil pan by a pan to case bolt. The

tag includes the model prefix and suf-
fix, assembly part number and the

build date code.

The service identification number

indicates changes to service details

which affect interchangeability when

the transmission model is not

changed. For interpretation of this

number, see the Master Parts Catal-

og-

The tag must be kept with the indi-

vidual transmission it was originally
installed on. If the tag was removed

during disassembly, reinstall it on the

same unit.

The FMX transmission is a three

speed unit capable of providing auto-

matic upshifts and downshifts through

the three forward gear ratios, and also

capable of providing manual selection

of first and second gears.

The transmission consists essentially

of a torque converter, planetary gear

train, two multiple disc clutches and a

hydraulic control system (Fig. 3).
procarmanuals.com