1969 FORD MUSTANG automatic transmission

07-04-24

C-6 Automatic Transmission

07-04-24

CONVERTER PRESSURE RELIEF VALVE

THROTTLE PRESSURE

RELIEF BALL1/4 INCH

DIA. AND SPRING

CONVERTER

PRESSURE

RELIEF

SPRING

2-3 SHIFT

CHECK VALVE

D 1765-C

FIG. 39—Converter Pressure Relief Valve, Throttle Pressure Relief Valve,

and
2-3
Shift Check Valve Locations

FRONT PUMP

Tool
-
7775-AS

Tool -
T50T-
100-A

or 73-760

Tool
-T63L- 77837 -A

D 1636 -A

FIG. 40—Removing Front Pump

Seal

4.
Carefully position
the
separator

plate,
new
gasket
and the
lower valve

body
on the
upper valve body
and in-

stall
and
torque
the
attaching bolts
to

specification.

5.
Secure
the
screen
to the
lower

valve body with
the
attaching bolts

and torque them
to
specification.

6. Place
the
cutback control valve

(Fig.
38) in the
valve body.

7.
Place
the
coasting regulator

valve
in the
body.

8. Place
the
spring
D2
shift valve

and
the 1-2
shift valve
in the
body.

9. Place
the
throttle modulator

valve
and
spring
and the 2-3
shift

valve
in the
valve body.
D 1637-A

FIG. 41—Installing Front Pump

Seal

10.
Place
the
spring
and the 2-3

backout valve
in the
valve body.

11.
Place
the two
springs
and the

intermediate servo accumulator valve

in
the
valve body.

12.
Place
the
intermediate servo

modulator valve
and
spring
in the

body.

13.
Carefully place
the
valve retain-

ing plate
on the
body
and
secure
it

with
the
eight attaching screws. Tigh-

ten
the
screws
to
specification.

14.
Place
the
throttle booster valve

and spring
in the
valve body. Place

the manual
low 2-1
scheduling valve

and spring
in the
valve body
and in-
stall
the
retaining plate. Torque
the

attaching screws
to
specification.

15.
Place
the
main regulator,
two

springs, pressure booster valve
and the

sleeve
in the
valve body.

16.
Install
the
pressure booster

plate
and
torque
the two
attaching

screws
to
specification.

17.
Place
the
manual valve
in the

valve body
and
install
the
detent plug,

spring
and the
retaining
pin in the

body.

FRONT PUMP

The front seal
can be
replaced after

the pump
has
been installed
on the

transmission (Figs.
40 and 41).

Disassembly

1.
Remove
the two
seal-rings
and

the selective thrust washer (Fig.
42).

2.
Remove
the
large square-cut seal

from
the
O.D.
of the
pump housing.

3.
Remove
the 5
bolts that secure

the pump support
to the
pump hous-

ing. Lift
the
support from
the
housing.

4.
Remove
the
drive
and the
driven

gear from
the
housing.

Assembly

1.
Install
the
drive
and
driven gears

in
the
pump housing. Each gear
has

an identification mark
on one
face.

The identification mark
on
each gear

must
be
toward
the
front
of the
pump

housing.

2.
Position
the
pump support
in the

pump housing
and
install
and
torque

the five attaching bolts
to
specifica-

tion.

3.
Carefully install
two new
seal

rings
on the
pump support. Make sure

that
the
ends
of the
rings
are
engaged

to lock them
in
place. Install
a new

square-cut seal
on the O.D. of the

pump housing.

4.
Install
the
selective thrust wash-

er. Make sure that
the
correct thick-

ness selective washer
is
being used
to

obtain
the
specified
end
play.

5.
Place
the
pump
on
converter

making sure that
the
drive gear enga-

ges
the
converter
hub.
Rotate
the

pump
to
make sure that
the
gears
ro-

tate freely.

REVERSE-HIGH CLUTCH

Disassembly

1.
Separate
the
drive train
as
shown

in
Fig. 43.
Remove
the
pressure plate

retaining snap ring
as
shown
in Fig.

44.procarmanuals.com

07-04-25

C-6 Automatic Transmission

07-04-25

FRONT

PUMPSEAL-7A24&
DRIVEN

GEAR-7C011

FIG. 42—Front Pump Disassembled
STATOR SUPPORT-7A109

SELECTIVE THRUST

WASHER

7D014

GASKET

7A136
SEAL

RINGS

7D429

D 1619-B

2.
Remove the pressure plate and

the drive and driven clutch plates (Fig.

45).

3.
Install Tool T65L-77515-A (Fig.

46) on the reverse-high clutch drum.

Make sure that the legs clear the

snap ring enough to permit expanding

it enough for removing it. Remove the

snap rings and remove the tool.

4.
Remove the spring retainer and

the piston return springs.

5.
Apply air pressure to the piston

apply hole in the clutch hub (Fig. 47)

and remove the piston.

6. Remove the piston outer seal

from the piston and the inner seal

from the clutch drum (Fig. 45).

7.
Remove the front and rear bush-

ings from the clutch drum if they are

worn or damaged. To remove the

front bushing, use a 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 remove the bush-

ing.

To remove the rear bushing, use the

tool shown in Fig. 48, and press the

bushing from the drum.

Assembly

1.
If the clutch drum bushings were

removed, position the drum in a press

and press new bushings into the drum

with the tools shown in Figs. 48 or 49.

2.
Dip the new seals in transmission

fluid and install one on the drum and

one on the piston.

3.
Install the piston in the clutch

drum.

4.
Position the piston return springs

in the piston sockets. Place the spring

retainer on the springs.
5.
Install Tool T65L-77515-A (Fig.

46) and compress the springs. Make

certain that the spring retainer is cen-

tered while compressing the springs.

Install the snap ring. Before releasing

the pressure on the tool, make certain

that the snap ring is positioned inside

of the four snap ring guides on the

spring retainer.

6. Clutch plate usage varies with

each model, refer to the Specifications

Section for the number of plates re-

quired. Dip the clutch plates in clean

transmission fluid. Install the clutch

plates alternately starting with a steel

drive plate (Fig. 45).

7.
After all clutch plates have been

installed, position the pressure plate in

the clutch drum. Install the pressure

plate snap ring.

8. With a feeler gauge, check the

clearance between the pressure plate

and snap ring (Fig. 50).

9. The pressure plate should be held

downward as the clearance is checked.

Refer to the Specification Section for

the proper clearance. If the clearance

is not within specifications, selective

thickness snap rings are available in

the following thicknesses: 0.065-0.069,

0.074-0.078, and 0.083-0.087 inch. In-

stall the correct size snap ring and re-

check the clearance.

FORWARD CLUTCH

Disassembly

1.
Remove the clutch pressure plate

retaining snap ring (Fig. 51).

2.
Remove the rear pressure plate,

the drive and driven plates and the

forward pressure plate from the clutch

hub (Fig. 52).
3.
Remove the snap ring (Fig. 53)

that secures the disc spring in the

clutch cylinder. Remove the disc

spring.

4.
Apply air pressure to the clutch

apply passage in the cylinder (Fig. 54)

to remove the piston.

5.
Remove the seal from the piston

and the seal from the clutch hub (Fig.

52).

Assembly

1.
Dip two new seals in transmis-

sion fluid. Install the smaller seal on

the clutch hub and the other seal on

the clutch piston.

2.
Install the clutch piston in the

cylinder.

3.
Make sure that the steel pressure

ring is in the groove on the piston.

Position the disc spring in the cylinder

with the dished face downward. Install

the spring as shown in Fig. 56. Secure

the disc with the retaining snap ring.

4.
Install the forward pressure plate

with the flat side up and the beveled

side downward. Install first a compos-

ition driven plate and a steel drive

plate (Fig. 52). Install the remaining

plates in this sequence. Refer to the

Specification Section for the number

of plates required. The last plate in-

stalled will be the rear pressure plate.

Install the snap ring and make certain

that it seats fully in the groove.

5.
With a feeler gauge, check the

clearance between the snap ring and

the pressure plate (Fig. 55). Down-

ward pressure on the plate should be

maintained when making this check.

Refer to the Specifications Section for

the proper clearance.procarmanuals.com

07-04-26

C-6 Automatic Transmission

07-04-26

1 2

\

\

1.
FRONT PUMP SEAL RING

2.
FRONT PUMP

3. GASKET

4. SEAL

5. NUMBER
1
THRUST WASHER

(SELECTIVE)

6. REVERSE-HIGH CLUTCH

ASSEMBLY

7. NUMBER 2 THRUST WASHER

8. FORWARD CLUTCH ASSEMBLY

9.
NUMBER 3 THRUST WASHER

10.
NUMBER 4 THRUST WASHER
11.
FORWARD CLUTCH HUB

ASSEMBLY

12.
NUMBER 5 THRUST WASHER

13.
FORWARD PLANET ASSEMBLY

14.
INPUT SHELL AND SUN

GEAR ASSEMBLY

15.
NUMBER 6 THRUST WASHER

16.
SNAP RING

17.
NUMBER 7 THRUST WASHER

18.
REVERSE PLANET ASSEMBLY

19.
NUMBER 8 THRUST WASHER
20.
REVERSE RING GEAR AND

HUB RETAINING RING

21.
REVERSE RING GEAR AND HUB

22.
NUMBER 9 THRUST WASHER

23.
LOW-REVERSE CLUTCH HUB

24.
ONE-WAY CLUTCH

25.
ONE-WAY CLUTCH INNER RACE

26.
SNAP RING

27.
LOW-REVERSE CLUTCH

28.
SNAP RING

29.
LOW-REVERSE PISTON RETURN
SPRING RETAINER

30.
RETURN SPRING

31.
LOW-REVERSE PISTON

32.
CASE

33.
NUMBER 10 THRUST WASHER

34.
PARKING GEAR

35.
GOVERNOR DISTRIBUTOR SLEEVE

36.
SNAP RING

37.
GOVERNOR DISTRIBUTOR

38.
GOVERNOR

39.
OUTPUT SHAFT

D 1620-A

FIG. 43—Drive Train Disassembledprocarmanuals.com

07-04-27
C-6 Automatic Transmission

07-04-27

SNAP RING
REVERSE-HIGH

CLUTCH DRUM

D1420-A

FIG. 44—Removing
or
Installing

Reverse-High Clutch Pressure Plate

Snap Ring
Tool 765 L-77515-A

Tool
7
65
L-77575-A

D 1591-A

FIG. 46—Removing
or
Installing Reverse-High Clutch Piston Snap Ring

REVERSE-HIGH

CLUTCH DRUM

7D044
INTERNAL SPLINE SELECTIVE

PLATE-7E>164 SNAP

RING

£T
377126-S

7D427
\

D1631
-
A

FIG. 45— Reverse-High Clutch Disassembled

6.
If the
clearance
is not
within

specifications, selective snap rings
are

available
in the
following thicknesses:

0.056-0.060, 0.065-0.069, 0.074-0.078,

0.083-0.087
and
0.092-0.096 inch.
In-

sert
the
correct size snap ring
and re-

check
the
clearance.

INPUT SHELL
AND

SUN GEAR

Disassembly
Tool— 7000- DD

D1422-A

FIG. 47—Removing Reverse-High

Clutch Piston
2.
Place
the No. 6
thrust washer
on

the
sun
gear
and
install
the
rear snap

ring.

OUTPUT SHAFT
HUB

AND RING GEAR

Disassembly

1.
Remove
the hub
retaining snap

ring (Fig.
58)
from
the
ring gear.

2.
Lift
the hub
from
the
ring gear.

1.
Remove
the
external snap ring

on from
the sun
gear
as
shown
in

Fig. 56.

2.
Remove
the
thrust washer from

the input shell
and sun
gear (Fig.
57).

3.
Working from inside
the
input

shell remove
the sun
gear. Remove
the

internal snap ring from
the
gear.
Assembly

1.
Install
the
forward snap ring
on

the forward
end
(short end)
of the sun

gear
(Fig. 57).
Working from inside

the input shell, slide
the sun
gear
and

snap ring into place making sure that

the longer
end is at the
rear (Fig.
57).
Assembly

1.
Position
the hub in the
ring gear.

2.
Secure
the hub
with
the
retaining

snap ring. Make certain that
the
snap

ring
is
fully engaged with
the
groove.procarmanuals.com

07-04-28

C-6 Automatic Transmission

07-04-28

SNAP RING

REMOVAL INSTALLATION

FIG. 48 — Replacing Reverse-High Clutch Rear Bushing
D2035-A

Press Ram

Tool-T69L-7D044-A

D2036-A

FIG. 49—Installing Reverse-High

Clutch Front Bushing

D1898-A

FIG. 50—Checking Reverse-High

Clutch Snap Ring Clearance

ONE-WAY CLUTCH

Disassembly

1.
Remove the snap ring and rear

bushing from the rear of the low-

reverse clutch hub (Fig. 59).

2.
Remove the springs and rollers

from the spring retainer and lift the

spring retainer from the hub.

3.
Remove the remaining bushing

and snap ring from the hub.
Assembly

1.
Install a snap ring in the forward

snap ring groove of the low-reverse

clutch hub.

2.
Place the low-reverse clutch hub

on the bench with the forward end

down (Fig. 60).

3.
Place the forward clutch bushing

against the snap ring with the flat side

up.
Install the one-way clutch spring

retainer on top of the bushing. Be sure

to install the retainer in the hub so

that the springs load the rollers in a

counterclockwise direction when look-

ing down at the unit (Fig. 60).

4.
Install a spring and roller into

each of the spring retainer compart-

ments by slightly compressing each

spring and positioning the roller be-

tween the spring and the spring retain-

er (Fig. 60).

5.
Install the rear bushing on top of

the retainer with the flat side down.

6. Install the remaining snap ring

at the rear of the low-reverse clutch

hub to secure the assembly.

SERVO

Disassembly

1.
Apply air pressure to the port in

the servo cover to remove the piston

and rod.

2.
Remove the seals from the pis-

ton.

On Lincoln Continental and Conti-

nental Mark III models, replace the

complete piston and rod assembly if

the piston or piston sealing lips are

unserviceable or damaged.

3.
Remove the seal from the cover.
D1899-A

FIG. 51—Removing Forward

Clutch Pressure Plate Snap Ring

Assembly

1.
Dip the new seals in transmission

fluid.

2.
Install new seals on the cover

and servo piston. Fig. 61 shows the

correct servo piston and cover for the

transmission.

3.
Dip the piston in transmission

fluid and install it in the cover.

LOW-REVERSE CLUTCH

PISTON

Disassembly

1.
Remove the inner and the outer

seal from the reverse clutch piston.

Assembly

1.
Dip the two new seals in clean

transmission fluid.

2.
Install the seals on the piston.

OUTPUT SHAFT

Disassembly

1.
Remove the governor attaching

bolts and remove the governor.

2.
Remove the snap ring that se-

cures the governor distributor on the

output shaft (Fig. 62) and slide it off

the front of the shaft.

3.
Remove the seal rings from the

distributor.

Assembly

1.
Carefully install new seal rings

on the distributor.

2.
Working from the front end of

the output shaft, slide the governorprocarmanuals.com

07-04-29
C-6 Automatic Transmission

07-04-29

FORWARD CLUTCH

CYLINDER-7D424
OUTER SEAL

7A548
DISC SPRING FORWARD PRESSURE INTERNAL SPLINE REAR PRESSURE

7B070

PLATE-7B066

PLATE-7B164 PLATE-7B066

INNER SEAL

377130894
PISTON

7A262 STEEL

RING

7D256
SNAP

RING

377127-S

FIG. 52—Forward Clutch Disassembled

DISC

SPRING
EXTERNAL SPLINE

PLATE-7B442

7oo/-

7000-DD
SELECTIVE

SNAP RING

377126-S

D 1635-A

FIG. 53—Removing or Installing Disc Spring

distributor into place on the shaft. In-

stall the snap ring to secure it. Make

sure that the snap ring is seated in the

groove.

3.
Position the governor on the dis-

tributor (Fig. 62) and secure them

with the attaching screws.

ASSEMBLY OF TRANSMISSION

1.
Place the transmission case in a

holding fixture.

2.
Position the low-reverse clutch

piston so that check ball is in the 6 o'

clock position (toward bottom of case)
and tap the piston into place in the

case with a clean rubber hammer.

3.
Hold the one-way clutch inner

race in position and install and torque

the attaching bolts to specification.

4.
Install a low-reverse clutch re-

turn spring in each pocket in the

clutch piston. Press the springs firmly

into the piston to prevent them from

falling out.

5.
Position the spring retainer over

the springs and position the retainer

snap ring in place on the one-way

clutch inner race.
D1632-A

D1901-A

FIG. 54—Removing Forward

Clutch Piston

CHECK BETWEEN SNAP RING

AND PRESSURE PLATE

1902-A

FIG. 55—Checking Forward

Clutch Clearance

PICK

SCREWDRIVER

D 1633-A

FIG. 56—Removing Sun Gear

Snap Ringprocarmanuals.com

07-04-30
C-6 Automatic Transmission
07-04-30

6. Install the compressing tool

shown in Fig. 29 and compress the

springs just enough to install the low-

reverse clutch piston retainer snap

ring.

7.
Install the snap ring, then re-

move the compressing tool.

8. Place the transmission case on

the bench with the front end facing

downward.

9. Position the parking gear thrust

washer and the gear on the case (Fig.

33).
Do not restake the thrust washer.

10.
Position the oil distributor and

tubes in place on the rear of the case.

Install and torque the attaching bolts

to specification.

11.
Install the output shaft, and

governor as an assembly.

12.
Place a new gasket on the rear

of the transmission case. Position the

extension housing on the case and in-

stall the attaching bolts. Torque the

attaching bolts to specification.

13.
Place the case in the holding

fixture.

14.
Align the low-reverse clutch hub

and one-way clutch with the inner

race at the rear of the case. Rotate

the low-reverse clutch hub clockwise

while applying pressure to seat it on

the inner race.

15.
Install the low-reverse clutch

plates,
starting with a steel plate and

following with friction and steel plates

alternately. Retain them with vaseline.

Refer to the Specifications Section for

the number of plates required. If new

composition plates are being used,

soak them in clean transmission fluid

for fifteen minutes before installation.

Install the pressure plate and the snap

ring. Test the operation of the low-

reverse clutch by applying air pressure

at the clutch pressure apply hole in

the case.

16.
Install the reverse planet ring

gear thrust washer and the ring gear

and hub assembly. Insert the snap

ring in the groove in the output shaft.

17.
Assemble the front and rear

thrust washers onto the reverse planet

assembly; retain with vasoline. Insert

the assembly into the ring gear and

install the snap ring.

18.
Set the reverse-high clutch on

the bench, with the front end facing

down. Install the thrust washer on the

rear end of the reverse-high clutch as-

sembly. Retain the thrust washer with

vaseline and insert the splined end of

forward clutch into the open end of

the reverse-high clutch so that the

splines engage the direct clutch fric-

tion plates (Fig. 43).

19.
Install the thrust washer and re-

tain it with vaseline, on the front end
FORWARD

SNAP

RING

377300-S
SUN
GEAR

7A348

•
INPUT

SHELL

7D064

\
THRUST

WASHER

7D066

-IT

REAR

SNAP

RING

377300-S

I)
1634-A

57—Input Shell and Sun Gear Disassembled

of the forward planet ring gear and

hub.
Insert the ring gear into the for-

ward clutch.

20.
Install the thrust washer on the

front end of the forward planet assem-

bly. Retain the washer with vaseline

and insert the assembly into the ring

gear. Install the input shell and sun

gear assembly.

21.
Install the reverse-high clutch,

forward clutch, forward planet assem-

bly and drive input shell and sun gear

as an assembly into the transmission

case.

22.
Insert the intermediate band

into the case around the direct clutch
GEAR

SNAP RING

HUB AND FLANGE
D1906-A

FIG. 58—Output Shaft Hub and

Ring Gear

LOW-REVERSE

CLUTCH
DRUM-

7D390

SPRING

RETAINER-

7D191

BUSHING
-

7E194

SPRING
-
7D170

ROLLER-7190

D 1928-A

FIG. 59—One-Way Clutch Disassembled

cylinder.Install the struts and then

tighten the band adjusting screw suffi-

ciently to retain the band.

23.
Place a selective thickness bronze

thrust washer on the rear shoulder of

the stator support and retain it with

vaseline. If the end play was not

within specification when checked prior
to disassembly, replace the washer with

one of proper thickness. Refer to

Specifications Section for selective

thrust washer thicknesses. Lay a new

gasket on the rear mounting face of

the pump and position on the case

being careful not to damage the large

seal on the O.D. of the pump hous-procarmanuals.com

07-04-31
C-6 Automatic Transmission

07-04-31

ing. Install six of the seven mounting

bolts and torque them to specifica-

tion.

24.
Adjust the intermediate band as

detailed in Section 2 and install the

input shaft with the long splined end

inserted into the forward clutch as-

sembly.

LOW-REVERSE

SPRING LOAD ON ROLLERS CLUTCH HUB

MUST BE IN A COUNTERCLOCKWISE

DIRECTION FOR INSTALLATION Q 192O A

FIG. 60—Installing One-Way

Clutch
25.
Install tool 4201-C at the sev-

enth pump mounting bolt (Fig. 24)

and check the transmission end play.

Remove the tool.

26.
Install the control valve in the

case,
making sure that the levers en-

gage the valves properly. Install the
primary throttle valve, rod, and the

vacuum diaphragm in the case.

27.
Install a new pan gasket and

the pan.

28.
Install the converter assembly.

29.
Install the transmission in the

vehicle.

PISTON

AND ROD
PISTON

COVER

Models

PGA-A3,

J3,
Z, AA

PGB-AD,
AE, Jl

PGB-F2/G2, H2

PGB-AF1,
AG, AH
Piston

Assembly

C6AP-7D021-C

C6AP-7D021-D
Cover

C6AP-7D027-A

C6AP-7D027-D
Diameter - Inches

A

2.075

2.342

2.477
' B

2.980

3.025

NONE
c

2.971

3.016

3.492
D

2.066

2.333

2.468

Models

PGC-B,
Cl
Piston and

Rod Assembly
Cover
Diameter
—
Inches

A

2.183
B

2.739
C

2.705
D

2.220

D 2037-B

FIG.
61
— Intermediate Servo Cover and Piston Dimensions

OUTPUT

SHAFT
GOVERNOR

D
1623
-A

FIG. 62—Output Shaft Disassembledprocarmanuals.com