1969 FORD MUSTANG oil pressure

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

07-03-03
FMX Transmission

0703-03

PRIMARY DISTRIBUTOR SLEEVE EXTENSION HOUSING SEAL

SUN GEAR ! SPEEDOMETER DRIVE GEAR /

OIL SEAL ONE-WAY CLUTCH

FRONT FRONT

PUMP BAND

FRONT

CLUTCH

OUTPUT SHAFT

EXTENSION HOUSING

SPLINE SEAL

GOVERNOR

PRIMARY PINION

SECONDARY SUN GEAR

SECONDARY PINION

DIAPHRAGM

CONTROL VALVE BODY

OIL PAN

TURBINE SHAFT

FLYWHEEL
'REAR CLUTCH PISTON

REAR CLUTCH

REAR CLUTCH SPRING

FRONT CLUTCH PISTON

FRONT SERVO

PRESSURE REGULATOR BODY

STATOR SUPPORT

D 2045-A

FIG. 7—Typical FMX Transmission

TRANSMISSION MODEL

ENGINE DISPLACEMENT
BUILD DATE

FMX TRANSMISSION
SHIFT

D 2046-A

FIG. 2—Identification Tagsprocarmanuals.com

07-03-04

FMX Transmission

07-03-04

FORWARD

CLUTCH
REVERSE-HIGH

CLUTCH
' INTERMEDIATE SERVO

3-2 KICKDOWN

CONTROL VALVE
RELEASE

APPLY
LOW REVERSE

SERVO

ORIFICE

LOW SERVO

LOCKOUT

VALVE
2-3 SHIFT VALVE

AND THROTTLE

REDUCING VALVE

1-2 SHIFT

ACCUMULATOR

VALVE
CHECK BALL

USED IN PHD

MODEL

TRANSMISSIONS

ONLY

LOW SERVO

MODULATOR

VALVE

GOVERNOR

CONTROL PRESSURE

REGULATOR VALVE

FRONT PUMP

THROTTLE

BOOST VALVE

OIL
SCREEN
CONVERTER

CONVERTER

PRESSURE

REGULATOR

VALVE

THROTTLE

BOOST VALVE

POLICE
AND
TAXI,

ONLY
COOLER RETURN

OIL CHECK

VALVE

REAR

LUBE
OIL

COOLER

X EXHAUST

D 2047-A

FIG.
3—Hydraulic
Control System—FMX Transmissionprocarmanuals.com

07-03-11
FMX Transmission

07
03-11

GOVERNOR
COMPENSATOR

PRESSURE TUBE
MAIN CONTROL

VALVE TUBE

COUNTERWEIGHT

D 1815-A

FIG. 16—Governor Installed

ber to remove all weight from the

housing.

10.
Loosen the parking brake cable

adjustment nut enough to disconnect

the cables from the equalizer.

11.
Remove the extension housing

attaching bolts. Slide the housing off

the output shaft and remove the gas-

ket. When removing
the
extension

housing and/or governor, hold
the

output shaft
and
rear support from

moving rearward
to
prevent
the
needle

bearing
and
race from dropping
out of

location.

12.
Remove the governor to coun-

terweight attaching screws. Lift the

governor from the counterweight (Fig.

16).

13.
Lubricate the governor valve

parts with clean transmission fluid.

Make certain that
the
valve moves

freely
in the
valve body bore.

14.
Position the governor valve

body on the counterweight with the

cover facing toward the front of the

vehicle. Install and tighten the two at-

taching screws to the specified torque.

15.
Position a new extension hous-

ing gasket on the rear of the transmis-

sion case.

16.
Slide the extension housing into

place and secure it to the transmission

case with the attaching bolts. Torque

the bolts to specification. With the ex-

tension housing installed, rotate
the

output shaft.
The
shaft must rotate

freely
by
hand.
If the
shaft
is
tight
or

bound
up, it is
likely that
the
needle

bearing
and
race have dropped
out of

location,
in
which case,
the
transmis-

sion must
be
partially disassembled

and
the
bearing
and
race repositioned.

17.
Connect the speedometer cable

to the extension housing.

18.
Raise the transmission high

enough with a jack to position the en-
FRONT SERVO

FLUID TUBES

PRESSURE

REGULATOR

D 1817-A

FIG. 17—Typical Hydraulic Control System

gine rear support on the crossmember.

Secure the support to the crossmem-

ber with attaching bolt.

19.
Lower the transmission and re-

move the jack. Secure the extension

housing to the rear support with the

two attaching bolts.

20.
Connect the parking brake

cables to the equalizer and adjust the

cables as required.

21.
Install the driveshaft.

22.
Fill the transmission to the cor-

rect level with the specified fluid.

OIL
PAN AND
CONTROL

VALVE BODY REPLACEMENT

1. Raise the vehicle so that the

transmission fluid pan is accessible.

2.
Drain the fluid from the trans-

mission by loosening the pan attach-

ing bolts starting at the rear of the

pan and working toward the front.

When most of the fluid has drained

from the pan, remove the remainder

of the attaching bolts. Remove the

pan and gasket. Discard the gasket. If

the same fluid is to be used again in

the transmission, filter the fluid

through a 100-mesh screen before in-

stalling it in the transmission. Re-use

the fluid only if it is in good condi-

tion.
3.
Disconnect the hose from the

vacuum diaphragm unit. Remove the

diaphragm unit using tool FCO-24.

Do
not use any
tools
on the dia-

phragm housing, such
as
pliers, pipe

wrenches,
etc. Do not
allow solvents

to enter
the
diaphragm unit. Remove

the push rod. Remove the fluid screen

retaining clip and the screen.

4.
Remove the fluid filter retaining

clip and the filter.

5.
Remove the two tubes which

connect to the pressure regulator and

the control valve body (Fig. 17).

6. Loosen the front servo attaching

bolts three turns.

7.
Remove the three control valve

body attaching bolts, and lower the

valve body while pulling it off the

front servo tubes. Be carefull not to

damage
the
valve body
or the
tubes.

8.
Before installing the control

valve body, check for a bent manual

valve by rolling it on a flat surface.

9. Install the control valve body by

aligning the front servo tubes with the

holes in the valve body. Shift the man-

ual lever to the 1 detent, and place the

inner downshift lever between the

downshift lever stop and the downshift

valve.
The
manual valve must engage

the actuating
pin in the
manual detent

lever.

10.
Install but do not tighten, the

control valve body attaching bolts.procarmanuals.com

07-03-12
FMX Transmission
07-03-12

11.
Move the control valve body

toward the center of the case until the

clearance is less than 0.050 inch, be-

tween the manual valve and the act-

uating pin on the manual detent lever.

12.
Torque the attaching bolts to

specification. Be sure that the rear

fluid filter retaining clip is installed

under the valve body bolt as shown in

Figure 17.

13.
Install the tubes to the pressure

regulator and the control valve body.

14.
Turn the manual valve one full

turn in each manual lever detent posi-

tion. If the manual valve binds against

the actuating pin in any detent posi-

tion, loosen the valve body attaching

bolts and move the body away from

the center of the case. Move the valve

body only enough to relieve the bind-

ing. Torque the attaching bolts and

recheck the manual valve for binding.

15.
Position the push rod in the

bore of the vacuum diaphragm unit.

Using the diaphragm unit as a guide,

insert the push rod into the threaded

opening of the case. Torque the dia-

phragm unit to specification. Connect

the vacuum hose.

16.
Torque the front servo attach-

ing bolts to specification.

17.
Adjust the front band. If the

unit is a model PHB-C, D, E, F, G or

H, adjust the rear band at this time.

18.
Install the fluid filter and the

filter retaining clip.

19.
Position a new fluid pan gasket

on the bottom of the transmission

case,
and install the pan. Torque the

pan screws to specification.

20.
Adjust the rear band on

PHB-A and PHD models.

21.
Fill the transmission with fluid.

If
the
fluid that
was
drained from
the

transmission
is to be
used
again,
filter

the fluid through
a
100-mesh screen
as

it
is
poured back into
the
transmis-

sion.
Re-use
the
fluid only
if it is in

good
condition.

22.
If the control valve body was

replaced, adjust the transmission con-

trol linkage.

PRESSURE REGULATOR

REPLACEMENT

1. Drain the fluid from the trans-

mission, and remove the pan and fluid

filter.

2.
Remove the small compensator

pressure tube and the large control

pressure tube from the control valve

body and the pressure regulator.

3.
Remove the pressure regulator

spring retainer, springs, and spacer.

Maintain pressure
on the
retainer
to

prevent
the
springs from flying
out.
4.
Remove the pressure regulator

attaching bolts and washers, and re-

move the regulator.

5.
Position the replacement regula-

tor body on the transmission case and

install the two attaching bolts. Torque

the bolts to specification.

6. Check the converter pressure and

control pressure valves to be sure the

valves operate freely in the bores.

7.
Install the valve springs, spacer,

and retainer.

8. Install the large control pressure

tube,
and the small compensator pres-

sure tube.

9. Install the fluid filter and the

pan, and fill the transmission to the

correct level with the specified fluid.

FRONT SERVO REPLACEMENT

1. Drain the fluid from the trans-

mission, and remove the pan and fluid

filter.

2.
Remove the vacuum diaphragm

unit.

3.
Loosen the three control valve

body attaching bolts.

4.
Remove the attaching bolts from

the front servo (Fig. 17), hold the

strut with the fingers, and remove the

servo.

5.
To install the front servo, posi-

tion the front band forward in the

case with the end of the band facing

downward. Make sure the front servo

anchor pin is in position in the case

web.
Align the large end of the servo

strut with the servo actuating lever,

and align the small end with the band

end.

6. Rotate the band, strut, and servo

to align the anchor end of the band

with the anchor in the case.

Push the servo body onto the con-

trol valve body tubes.

7.
Install the attaching bolts and

torque to specification.

8. Torque the control valve body

attaching bolts to specification.
Check the clearance between the

manual valve and manual lever actuat-

ing pin as given in Oil Pan and Con-

trol Valve Body Replacement.

9. Adjust the front band.

10.
Install the vacuum diaphragm

unit and rod.

11.
Install the fluid filter and pan,

and fill the transmission with fluid.

12.
Adjust the downshift and manu-

al linkage.

REAR SERVO REPLACEMENT

1. Drain the fluid from the trans-

mission, and remove the pan and fluid

filter.

2.
Remove the vacuum diaphragm

unit.

3.
Remove the control valve body

and the two front servo tubes.

4.
Remove the attaching bolts from

the rear servo, hold the actuating and

anchor struts with the fingers, and re-

move the servo. Remove the servo

dowel on PHB models.

5.
To install the rear servo, position

the servo anchor strut on the servo

band, and rotate the band to engage

the strut.

6. Hold the servo anchor strut in

position with the fingers, position the

actuating lever strut, and install the

servo. Insert the servo dowel on PHB

models.

7.
Install the servo attaching bolts,

and torque them to specification. The

longer bolt must
be
installed
in the

inner bolt
hole.

8.
Install the two front servo tubes

and the control valve body.

Check the clearance between the

manual valve and the manual lever

actuating pin as given above in Oil

Pan and Control Valve Body Replace-

ment.

9. Adjust the rear band.

10.
Install the fluid filter and pan,

and fill the transmission with fluid.

Too/~7?75-AB

7oo/-T50T-JOO-A

78—Removing Extension Housing Seal
D 1927-Aprocarmanuals.com

07-03-21

FMX Transmission

07-03-21

Tool—1175-AB

Tool— T50T-100-A

D1962-A

FIG. 41—Removing Front Pump

Seal

8. Install
the oil
seal remover

shown
in Fig. 41.
Then pull
the
front

seal from
the
pump body.

9. Clean
the
pump body counter-

bore.
Then inspect
the
bore
for
rough

spots.
Smooth
up the
counterbore

with crocus cloth.

10.
Remove
the
pump body from

the transmission case.

11.
Coat
the
outer diameter
of a

new seal with FoMoCo Sealing
Com-

pound,
or its
equivalent. Then position

the seal
in the
pump body. Drive
the

seal into
the
pump body with
the
tool

shown
in Fig. 42
until
the
seal
is
firm-

ly seated
in the
body. Tool 77837
may

be reworked
(Fig. 43) to
install
the

latest type seal.

FRONT PUMP

BODY

D1963-A

FIG. 42—Installing Front Pump

Seal

CHAMFER
TO
REMOVE BURRS

FRONT PUMP
OIL
SEAL

INSTALLATION

MACHINE
OFF

D1964-A

FIG.
43—
Front Pump Seal

Installing Tool Modification
12.
Place
the
pump driven gear
in

the pump body with
the
mark
on the

gear facing down. Install
the
drive

gear
in the
pump body with
the
cham-

fered side
of the
flats facing down.

13.
Install
the
stator support
and

attaching screws. Check
the
pump

gears
for
free rotation.

REAR SUPPORT BUSHING

REPLACEMENT

1.
Remove
the
three pressure tubes

from
the
support housing.

2.
Remove
the
rear support bushing

if
it is
worn
or
damaged.
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 re-

move
the
bushing.

3.
Press
a new
bushing into
the

support housing with
the
tool shown

in
Fig. 44.

Too/
-
T64L-7003-A2
Handle

D 2050-A

FIG. 44—Installing Rear Support

Housing Bushing
4.
Install
the
pressure tubes.

PRESSURE REGULATOR

1.
Remove
the
valves from
the re-

gulator body.

2.
Remove
the
regulator body cover

attaching screws,
and
remove
the

cover
(Fig. 45).

3.
Remove
the
separator plate.

4.
Wash
all
parts thoroughly
in

clean solvent
and
blow
dry
with

moisture-free compressed
air.

5.
Inspect
the
regulator body
and

cover mating surfaces
for
burrs.

6. Check
all
fluid passages
for ob-

structions.

7.
Inspect
the
control pressure
and

converter pressure valves
and
bores
for

burrs
and
scores. Remove
all
burrs

carefully with crocus cloth.

8. Check
the
free movement
of the

valve
in
their bores. Each valve should

fall freely into
its
bore when both
the

valve
and
bore
are dry.

9. Inspect
the
valve springs
for dis-

tortion.

10.
Position
the
separator plate
on

the regulator cover.

11.
Position
the
regulator cover
and

separator plate
on the
regulator body,

and install
the
attaching screws.
Tor-

que
the
screws
to
specification.

12.
Insert
the
valves
in the
pressure

regulator body
(Fig. 45).

CONTROL VALVE BODY

During
the
disassembly
of the con-

trol valve assembly, avoid damage
to

valve parts
and
keep
the
valve parts

clean. Place
the
valve assembly
on a

clean shop towel while performing
the

disassembly operation.
Do not
sepa-

REGULATOR

BODY
CONTROL PRESSURE

VALVE

SEPARATOR
CONVERTER RETAINER

PRESSURE CONVERTER PRESSURE

VALVE SPRINGS

COVER
RETAINER

1111

1111

D1965-A

FIG. 45— Pressure Regulator Disassembledprocarmanuals.com

07-03-28
FMX Transmission

07-03-28

CENTER

SUPPORT
ROTATE

CARRIER

COUNTER

CLOCKWISE

SAWTEETH IN

CLOCKWISE

DIRECTION

MOVE ROLLER

TOWARD CENTER

D 1291-D

FIG. 56—Planetary Clutch Installation in Carrier—Center Support

Not Chamfered
er between the large internal gear and

the transmission case. Note the indi-

cator reading. End play should be

0.010-0.029 inch (minimum end play

is preferred).

4.
Remove the indicator and the

tool from the extension housing.

5.
Install the one remaining front

pump attaching bolt and torque it to

specification.

FRONT SERVO

1.
Position the front band forward

in the case with the band ends up.

2.
Position the servo strut with the

slotted end aligned with the servo act-

uating lever, and with the small end

aligned with the band end. Rotate the

band, strut, and servo into position

engaging the anchor end of the band

with the anchor pin in the case.

3.
Locate the servo on the case, and

install the attaching bolts. Tighten the

attaching bolts only two or three

threads.

4.
Install the servo release tube.

REAR SERVO

12.
Install the output shaft, careful-

ly meshing the internal gear with the

pinions.

REAR SUPPORT

1.
Position the needle bearing and

retainer on the rear support (Fig. 24).

2.
Position a new rear support to

case gasket on the rear support. Re-

tain the gasket with transmission

fluid.

3.
Install the rear support. As the

support is installed, insert the tubes

into the case.

GOVERNOR

1.
Position the governor drive ball

in the pocket in the output shaft. Re-

tain the ball with transmission fluid.

2.
Install the governor assembly, al-

igning the groove with the ball in the

output shaft.

3.
Install the governor with the gov-

ernor body plate toward the front of

the vehicle (Fig. 23). Install the gover-

nor snap ring

EXTENSION HOUSING

1.
Insert the extension housing oil

seal re placer and pilot in the housing.

Position a new gasket to the extension

housing and install the extension

housing on the transmission case.

Coat the bolt threads with B5A-
19554-A sealer and install the exten-

sion housing attaching bolts, breather

tube clip, vacuum tube clip, and exter-

nal tooth lock washer. The lock wash-

ers must be installed with the rolled

edge toward the transmission case to

insure a tight seal.

2.
Torque the extension housing at-

taching bolts to specification.

3.
Install the lubrication tube.

FRONT PUMP

1.
Position a new front pump gask-

et in the counterbore of the transmis-

sion case.

2.
Install the front pump, aligning

the pump bolt holes with the holes in

the case. Install three of the front

pump attaching bolts and torque them

to specification.

TRANSMISSION END

PLAY CHECK

1.
Mount the dial indicator support

in a front pump bolt hole. Mount a

dial indicator on the support so that

the contact rests on the end of the tur-

bine shaft.

2.
Use a large screwdriver to pry

the front of the clutch drum toward

the rear of the transmission. Set the

dial indicator at zero.

3.
Remove the screwdriver and pry

the units toward the front of the

transmission by inserting a screwdriv-
1.
Position the servo anchor strut,

and rotate the rear band to engage the

strut.

2.
Position the servo actuating lever

strut with a finger, and then install the

servo and attaching bolts. Torque the

bolts to specification.

3.
Install the front servo apply

tube.

PRESSURE REGULATOR

BODY

1.
Install the pressure regulator

body and attaching bolts, and torque

the bolts to specifications.

2.
Install the control and converter

valve guides and springs. Install the

spring retainer.

CONTROL VALVE BODY

1.
Install the control valve assem-

bly, carefully aligning the servo tubes

with the control valve. Align the inner

downshift lever between the stop and

the downshift valve. Shift the manual

lever to the 1 position. Align the man-

ual valve with the actuating pin in the

manual detent lever. Do not tighten

the attaching bolts.

2.
Move the control valve body

toward the center of the case until the

clearance is less than 0.050 inch be-

tween the manual valve and the act-

uating pin on the manual detent lever.

3.
Torque the attaching bolts toprocarmanuals.com

07-03-29
FMX Transmission

07-03-29

specification. Be sure that the rear

fluid screen retaining clip is installed

under the valve body bolt as shown in

Fig. 17.

4.
Install the large control pressure

tube in the valve body and regulator.

5.
Install the small control pressure

compensator tube in the valve body

and regulator.

6. Turn the manual valve one full

turn in each manual lever detent posi-

tion. If the manual valve binds against

the actuating pin in any detent posi-

tion, loosen the valve body attaching

bolts and move the body away from

the center of the case. Move the body

only enough to relieve the binding.

Torque the attaching bolts and check

the manual valve for binding.

7.
Torque the front servo attaching

bolts to specification.
FRONT AND REAR

BAND ADJUSTMENTS

Adjust the front and rear bands as

detailed in Section 2.

VACUUM DIAPHRAGM UNIT

1.
Position the control rod in the

bore of the vacuum diaphragm unit

and install the diaphragm unit. Make

sure the control rod enters the throttle

valve as the vacuum unit is installed.

2.
Torque the diaphragm unit to

specification.

FLUID FILTER

AND OIL PAN

1.
Position the fluid filter on the
rear clip so that the tang enters the

hole in the filter flange. Then, rotate

the filter (clockwise) until the grom-

met is over the pump inlet port of the

valve body regulator and press the fil-

ter down firmly. Install the filter re-

taining clip.

2.
Place a new gasket on the trans-

mission case and install the pan. In-

stall the attaching bolts and lock

washers and torque the bolts to speci-

fication.

If the converter and converter hous-

ing were removed from the transmis-

sion, install these components. Posi-

tion the transmission assembly on the

transmission jack, and refer to Trans-

mission Installation Procedures for in-

stalling the transmission.procarmanuals.com