1969 FORD MUSTANG Volume One Chassis

07-01-14

General Transmission Service

07-01-14

STATOR CLUTCH INNER RACE

Splh Fiber Bushing

END PLAY CHECK

Torque
Wrench

Torque
Wrench

Tool -T58L-7902-B or 7946-A

TURBINE HUB

STATOR CLUTCH CHECK

D1934-A

FIG. 21—Typical Converter Checking Tool—FMX Transmissionprocarmanuals.com

07-01-15

General Transmission Service

07-01-15

GOVERNOR

DRIVE BALL

POCKET

FRONT PUMP AND STATOR

SUPPORT SHAFT

D1922-A

FIG. 22—Stator to Impeller

Interference Check

snap rings are available in several

thicknesses for this purpose.

7.
Inspect the rubber seal and stop

ring at the front of the output shaft

spline. If wear or damage is evident,

replace the parts.

8. Inspect the primary sun gear for

broken or worn teeth. Inspect all

thrust surfaces and journals for scores.

Check all fluid passages (Fig. 26) for

obstructions and leakage. Inspect the

seal ring grooves for burrs.

9. Inspect the sun gear shaft splines

for burrs and wear.

10.
Check the fit of the seal rings

in the grooves of the shaft. The rings

should enter the grooves freely with-

out bind.

11.
Check the fit of the seal rings

in their respective bores. If equipped

with cast iron seal rings, a clearance

of 0.002-0.009 inch should exist be-

tween the ends of the rings.

INPUT SHAFT

FRONT PUMP AND

STATOR SUPPORT

SHAFT

CONVERTER

ASSEMBLY

D1923-A
TEAR DROP

D1935-A

FIG. 24—Correct Position of

Output Shaft Aluminum Sleeve

D1936-A

FIG. 25—Checking Output

Shaft Snap Ring Clearance
12.
Install the seal rings on the

shaft, and check for free movement in

the grooves.

PINION CARRIER, ONE-WAY

CLUTCH AND CENTER

SUPPORT (FMX

TRANSMISSION)

1.
Inspect the clutch outer race,

inner race, band surface, pinion gears,

bearings, and thrust washer (Fig. 27)

for roughness.

2.
Inspect the center support bush-

ing for roughness.

3.
Inspect the one-way clutch cage

rollers and springs for excessive wear

or damage.

PINION CARRIERS (C4 or

C6 TRANSMISSIONS)

Individual parts of the planet car-

riers are not serviceable.

1.
The pins and shafts in the planet

assemblies should be checked for loose

fit and/or complete disengagement.

Use a new planet assembly if either

condition exists. Before installing a

planet assembly, the shaft retaining

pins should be checked for adequate

staking. If staking does not appear

adequate, the pins should be restaked

before installation. When restaking,

the retaining pins must not be driven

into the carrier any further than 0.040

inch below the surface of the carrier.

2.
Inspect the pinion gears for dam-

aged or excessively worn teeth.

3.
Check for free rotation of the

pinion gears.

EXTENSION HOUSING

1.
Inspect the housing for cracks.

Inspect the gasket surface for burrs or

warpage.

2.
Inspect the bushing for scores or

wear.

3.
Inspect the rear seal for hard-

ness,
cracks, or wear. If the seal

FRONT LUBRICATION REAR LUBRICATION

CLUTCH \ CLUTCH
LUBRICATION

FRONT CLUTCH

D1937-A

FIG. 23—Stator to Turbine

Interference Check
FIG. 26—Primary Sun Gear Shaft—Cross Sectional Viewprocarmanuals.com

07-01-16
General Transmission bervice
07-01-16

CENTER SUPPORT

PLANETARY CLUTCH
"CAM TYPE" CLUTCH RACE

CHAMFER ON PRODUCTION

PART, ONLY-SERVICE PART NOT CHAMFERED
PLANET CARRIER

D1938-A

FIG. 27—Roller Type Planetary Clutch, Carrier and Center Support

shows wear or deterioration, replace

the seal.

4.
Inspect the seal counterbore and

remove all burrs and scores with cro-

cus cloth.

REAR CLUTCH (FMX)

AND REVERSE-HIGH CLUTCH

(C4 AND C6 AUTOMATIC)

1.
Inspect the drum band surface,

the bushing, and thrust surfaces for

scores. Minor scores may be removed

with crocus cloth. Badly scored parts

must be replaced.

Inspect the clutch piston bore and

the piston inner and outer bearing sur-

faces for scores. Check the air bleed

ball valve in the clutch piston for free

movement. Check the orifice to make

sure it is not plugged.

2.
Check the fluid passages for ob-

structions. All fluid passages must be

clean and free of obstructions.

3.
Inspect the clutch plates for wear

and scoring and check the plates for

fit on the clutch hub serrations. Re-

place all plates that are badly scored,

worn or do not fit freely in the hub

serrations.

4.
Inspect the clutch pressure plate

for scores on the clutch plate bearing

surface. Check the clutch release

spring(s) for distortion.

5.
On an FMX transmission, in-

spect the needle bearing for worn rol-

lers.

FRONT CLUTCH (FMX)

AND FORWARD CLUTCH

(C4 OR C6

TRANSMISSIONS)

1.
Inspect the clutch cylinder thrust

surfaces, piston bore, and clutch plate
serrations for scores or burrs. Minor

scores or burrs may be removed with

crocus cloth. Replace the clutch cylin-

der if it is badly scored or damaged.

2.
Check the fluid passage in the

clutch cylinder for obstructions. Clean

out all fluid passages. Inspect the

clutch piston for scores and replace if

necessary. Inspect the piston check

ball for freedom of movement and

proper seating (Fig. 28).

CLUTCH

CYLINDER

PISTON

SEAL
CLIP

D1939-A

. 28—Clutch Piston Check

Valve

3.
Check the clutch release spring

for distortion and cracks. Replace the

spring if it is distorted or cracked.
4.
Inspect the composition and the

steel clutch plates and the clutch pres-

sure plate for worn or scored bearing

surfaces. Replace all parts that are

deeply scored.

5.
On FMX and C4 transmissions,

check the clutch plates for flatness

and fit on the clutch hub serrations.

Discard any plate that does not slide

freely on the serrations or that is not

flat.

6. Check the clutch hub thrust sur-

faces for scores and the clutch hub

splines for wear.

7.
On an FMX transmission, in-

spect the turbine shaft bearing sur-

faces for scores. If excessive clearance

or scores are found, discard the unit.

Check the splines on the turbine

shaft for wear and replace the shaft if

the splines are excessively worn. In-

spect the bushing in the turbine shaft

for scores. On a C4 or C6 Automatic

transmission, check the input shaft for

damaged or worn splines.

FRONT PUMP AND

STATOR SUPPORT

1.
Inspect the mating surfaces of

the pump body and cover for burrs.

2.
Inspect the drive and driven gear

bearing surface for scores, and check

the gear teeth for burrs. Inspect the

stator support splines for burrs and

wear.

3.
Check the fluid passages for ob-

structions.

4.
If any parts other than the stator

support are found defective, replace

the pump as a unit. Minor burrs and

scores may be removed with crocus

cloth. The stator support is serviced

separately.

5.
On a C4 or C6 Automatic trans-

mission, check the oil ring grooves in

the stator support for nicks, burrs or

damaged edges. On a C6 transmis-

sion, check the large seal ring groove

of the pump body for damage. Check

the gasket mating surface of the pump

body for damage.

REAR SUPPORT

(FMX TRANSMISSION)

1.
Inspect the gasket mating sur-

faces for damage.

2.
Inspect the support bushing for

scores.

3.
Inspect the rear support fluid

passages for obstructions.

4.
Check the fit of the fluid tubes in

the support.procarmanuals.com

07-01-17
General Transmission Service
07-01-17

PRESSURE REGULATOR

(FMX TRANSMISSION)

1.
Inspect the regulator body and

cover mating surface for burrs.

2.
Check all fluid passages for ob-

structions.

3.
Inspect the control pressure and

converter pressure valves and bores for

burrs and scores. Remove all burrs

carefully with crocus cloth.

4.
Check free movement of the

valves in their bores. The valves

should fall freely into the bores when

both the valve and bore are dry.

5.
Inspect the valve springs and

spacers for distortion.

CONTROL VALVE BODY

1.
Clean all parts thoroughly in

clean solvent, and then blow them dry

with moisture-free compressed air.

2.
Inspect all valve and plug bores

for scores. Check all fluid passages for

obstructions. Inspect the check valve

for free movement. Inspect all mating

surfaces for burrs or distortion. In-

spect all plugs and valves for burrs

and scores. Crocus cloth can be used

to polish valves and plugs if care is

taken to avoid rounding the sharp

edges of the valves and plugs.

3.
Inspect all springs for distortion.

Check all valves and plugs for free

movement in their respective bores.

Valves and plugs, when dry, must fall

from their own weight in their respec-

tive bores.

4.
Roll the manual valve on a flat

surface to check it for a bent condi-

tion.

GOVERNOR

1.
Inspect the governor valves and

bores for scores. Minor scores may be
removed from the valves with crocus

cloth. Replace the governor if the

valves or body is deeply scored.

2.
Check for free movement of the

valves in the bores. The valves should

slide freely of their own weight in the

bores when dry. Inspect fluid passages

in the valve body and counterweight

for obstructions. All fluid passages

must be clean.

3.
Inspect the mating surfaces of

the governor body and governor dis-

tributor (C4 or C6 Automatic) for

burrs and distortion. Mating surfaces

must be smooth and flat.

4.
Check the mating surface of the

governor valve and the counterweight

on a FMX transmission for burrs or

scratches.

5.
When cleaning the governor as-

sembly (C4 Automatic), the oil screen

should be removed from the collector

body and thoroughly blown out with

compressed air.

FRONT SERVO (FMX)

AND INTERMEDIATE

SERVO (C4 AND C6

AUTOMATIC)

1.
Inspect the servo bore for cracks

and the piston bore and the servo pis-

ton stem for scores. Check fluid pas-

sages for obstructions. Replace seals

that are damaged.

2.
On an FMX transmission, check

the actuating lever for free movement,

and inspect it for wear. If necessary to

replace the actuating lever or shaft,

remove the retaining pin and push the

shaft out of the bracket.

Inspect the adjusting screw threads

and the threads in the lever for dam-

age.

3.
Check the servo spring and servo

band strut(s) for distortion.

4.
Inspect the cover seal and gasket

cover sealing surface for defects.
REAR SERVO (FMX)

AND LOW-REVERSE SERVO

(C4 TRANSMISSION)

1.
Inspect the servo body for cracks

and the piston bore for scores.

2.
Check the fluid passages for ob-

structions.

3.
Inspect the band and the struts

for distortion. Inspect the band ends

for cracks.

4.
Inspect the servo spring for dis-

tortion.

5.
Inspect the band lining for exces-

sive wear and bonding to the metal

band.

6. On an FMX transmission, check

the servo body to case mating surface

for burrs. Check the accumulator pis-

ton and the check valve for freedom

of movement. Check the actuating

lever socket for scores.

7.
Replace seals that are damaged.

CASE

Inspect the case for cracks and

stripped threads. Inspect the gasket

surfaces and mating surfaces for

burrs.
Check the vent for obstructions,

and check all fluid passages for ob-

structions and leakage (Figs. 10, 11

and 12).

Inspect the case bushing for scores.

Check all parking linkage parts for

wear or damage.

ONE-WAY CLUTCH

1.
Inspect the outer and inner races

for scores or damaged surface area

where the rollers contact the races. If

the outer race on the C6 transmission

is damaged, the low-reverse clutch hub

must be replaced.

2.
Inspect the rollers and springs

for excessive wear or damage.

3.
Inspect the spring and roller case

for bent or damaged spring retainers.procarmanuals.com

07-02^01

C4 Automatic Transmission
0702-01

PART 7-2 C4 Automatic
Transmission

PEA-A2 240-1V Column

PEA-MI 302-2V Column

PEA-N1 3O2-2V Console

PEB-B2 200-1V Console

PEB-C2 17O-1V,2OO-1V Column

PEE-M 302-2V Console

PEE-V 302-2V Column

PEE-AC 302-2V Console

PEE-AD 250-1V Console

PEE-AE 250-1V Column

PEE-AF 250-1V Console
MODEL APPLICATION
All
Models
Ford

X

X

X
Mercury
X

X

X
Meteor
Cougar
Fairiane

X

X

X

X
Falcon
X

X
Montego
X

X

X

X
Mustang
X

X

X
Lincoln-
Continental
Thunderbird
Continental-
Mark
III

COMPONENT INDEX

ASSEMBLY OF TRANSMISSION

BAND ADJUSTMENTS

Intermediate Band

Low-Reverse Band

CONTROL VALVE BODY

Cleaning and Inspection

Disassembly and Overhaul

Removal and Installation

DESCRIPTION

DISASSEMBLY AND OVERHAUL OF

TRANSMISSION

End Play Check

DOWNSHIFT LINKAGE

Adjustments

Parts Repair or Replacement

EXTENSION HOUSING

Cleaning and Inspection

Removal and Installation

EXTENSION HOUSING BUSHING

Removal and Installation

EXTENSION HOUSING REAR SEAL

Removal and Installation

FORWARD CLUTCH

Cleaning and Inspection

Disassembly and Overhaul

FORWARD CLUTCH HUB AND RING

GEAR

Disassembly and Overhaul

FRONT PUMP

Cleaning and Inspection

Disassembly and Overhaul

All
Models
02-27

02-09

02-09

01-16

02-19

02-11

02-02

02-12

02-12

02-04

02-17

01-14

02-10

02-10

02-10

01-15

02-24

02-25

01-15

02-21
COMPONENT INDEX

GOVERNOR AND OIL DISTRIBUTOR

Cleaning and Inspection

Disassembly and Overhaul

Removal and Installation

INTERMEDIATE SERVO

Cleaning and Inspection

Parts Repair or Replacement

Removal and Installation

INPUT SHELL AND SUN GEAR

Disassembly and Overhaul

LOW-REVERSE BRAKE DRUM BUSHING

Disassembly and Overhaul

LOW-REVERSE SERVO

Cleaning and Inspection

Parts Repair or Replacement

LOW-REVERSE SERVO PISTON

Removal and Installation

MANUAL LINKAGE

Adjustments

Parts Repair or Replacement

NEUTRAL START SWITCH-CONSOLE

SHIFT

Adjustment

Removal and Installation

(Refer to Part 7-1 for Column Shift Adjus

ment and Removal and Installation Pro-

cedures)

OIL PAN

Removal and Installation

REVERSE-HIGH CLUTCH

Cleaning and Inspection
All
Models
01-16

02-26

02-10

01-16

02-16

02-09

02-25

02-26

01-16

02-16

02-09

02-04

02-17

02-04

02-07

02-09

01-15
procarmanuals.com

J7-02-02
C4 Automatic Transmission
07-02-02

COMPONENT INDEX

Disassembly and Overhaul

REVERSE RING GEAR AND HUB

Disassembly and Overhaul

SELECTOR LEVER-CONSOLE SHIFT

Removal and Installation

THROTTLE LINKAGE
All
Models
02-22

02-26

02-08
COMPONENT INDEX

Adjustments

TRANSMISSION (Complete)

Removal and Installation

TRANSMISSION CASE BUSHING

Parts Repair or Replacement

TRANSMISSION CASE THREAD REPAIR
All
Models
02-04

02-11

02-18

02-18

DESCRIPTION

CONVERTER HOUSING,

CONVERTER
STATOR SUPPORT

FRONT PUMP CASE

INTERMEDIATE

BAND

LOW-REVERSE DRUM
-,

FORWARD CLUTCH

HUB AND RING GEAR

INPUT

SHELL
REVERSE RING GEAR

LOW REVERSE BAND

ONE-WAY

CLUTCH
GOVERNOR

DISTRIBUTOR

SLEEVE

GOVERNOR

DISTRIBUTOR

SPLINE SEAL

EXTENSION

HOUSING

SPEEDOMETER

DRIVE GEAR

GOVERNOR

REVERSE PLANET CARRIER

FRONT PLANET CARRIER

PARK TOGGLE LEVER

LOW-REVERSE SERVO PISTON

FORWARD CLUTCH

CONTROL LEVERS

FIG.
1—C4
Automatic Transmission

DESCRIPTION

Figure
1
shows
the
location
of the

converter, front pump, clutches, gear

train
and
most
of the
internal parts

used
in
the C4 transmission. The iden-

tification
tag
(Fig.
2) is
located under

the lower front intermediate servo

cover bolt.
The tag
shows
the
model

prefix
and
suffix, assembly part num-

bers,
and the
built date code.
The

service identification number indicates

changes
to
service details which affect

interchangeability when
the
transmis-

sion model
is not
changed.
For
inter-

pretation
of
this number, see the Mas-

ter Parts Catalog.
REVERSE-HIGH CLUTCH

IMPELLER CONTROL VALVE BODY

TRANSMISSION MODEL
D 1474-A

ASSEMBLY PART NO. BUILD DATE

FIG.
2—Identification
Tag

The
C4
transmission
is a
three

speed unit capable
of
providing auto-

matic upshifts
and
downshifts through
SHIFT

D1846-A

the three forward gear ratios,
and
also

capable
of
providing manual selection

of first
and
second gears.
procarmanuals.com

07-02-03

C4 Automatic Transmission

07-02-03

CONVERTER

FORWARD CLUTCH
PRIMARY GOVERNOR

CONVERTER

CHECK VALVE
ONE-WAY

CLUTCH

DRAIN-BACK

VALVE

FRONT LUBE

CONVERTER

PRESSURE

RELIEF VALVE
LOW AND

REVERSE

SERVO
AND DIRECT

CLUTCH

L

SECONDARY

GOVERNOR
INTERMEDIATE

BAND

ACCUMULATOR

VALVE
CUT-BACK
VALVE

2-3
BACK-OUT

VALVE

MAIN

REGU-

LATOR

VALVE
MANUAL
LOW

VALVE

1-2 SHIFT

VALVE

D2
VALVE
THROTTLE

MODULATOR

VALVE

THROTTLE

BOOST VALVE

PRESSURE

BOOSTER

VALVE

DOWNSHIFT VALVE

LINE

COASTING

BOOST

VALVE
ENGINE
MANIFOLD
VACUUM

LESS THAN
20
INCHES

PRIMARY

THROTTLE

VALVE

(CASE)
VACUUM

DIAPHRAGM

OIL
SCREEN

I) 1724-E

FIG. 3—Hydraulic Control Systemprocarmanuals.com

07-02-04
C4 Automatic Transmission

07-02-04

The transmission consists essentially

of a torque converter, planetary gear

train, two multiple disc clutches, a
one-way clutch and a hydraulic con-

trol system (Fig. 3).

The only adjustments on the trans-
mission proper are the intermediate

and low-reverse bands.

TRANSMISSION

MANUAL LEVER
2 IN-VEHICLE ADJUSTMENTS
AND
REPAIRS

CONTROL LINKAGE ADJUSTMENTS

The transmission control linkage

adjustments should be performed in

the order in which they appear in this

section of the manual.

THROTTLE AND DOWNSHIFT

LINKAGE ADJUSTMENTS

Adjusting the throttle linkage is im-

portant to be certain the throttle and

kickdown systems are properly adjust-

ed. The kickdown system should come

in when the accelerator is pressed

through detent, and not before detent.

Refer to Group 10 for detailed

throttle and downshift linkage adjust-

ment procedures.

MANUAL LINKAGE

ADJUSTMENTS

Column Shift

1.
Place the selector lever in the D

position tight against the D stop.

2.
Loosen the shift rod adjusting

nut at point A (Fig. 4 or 5).

3.
Shift the manual lever at the

transmission into the D detent posi-

tion, third from the rear.

4.
Make sure that the selector lever

has not moved from the D stop; then,

tighten the nut at point A to 10-20 ft-

lbs.

5.
Check the transmission operation

for all selector lever detent positions.

Console Shift

1.
Position the transmission selec-

tor lever in D position.

2.
Raise the vehicle and loosen the

manual lever shift rod retaining nut

(Fig. 6, 7 or 8). Move the transmis-

sion manual lever to the D position,

fourth detent position from the back

of the transmission.

3.
With the transmission selector

lever and manual lever in the D posi-

tions,
torque the attaching nut 10 to

20 ft-lbs.

4.
Check the operation of the trans-

mission in each selector lever position.

NEUTRAL START SWITCH

ADJUSTMENT—CONSOLE SHIFT

On vehicles equipped with a

column-mounted neutral start switch,

refer to Part 7-1, Section 2, for the

adjustment procedures.

FORD-METEOR

1.
With the manual linkage proper-
COLUMN SHIFT LEVER

D2020-A

FIG.
4—Manual
Linkage—Column Shift—Ford
and
Meteor

"COLUMN

SHIFT LEVER

POINT
A

SHIFT
ROD

D2021-A

FIG.
5—Typical
Manual Linkage—Column
Shift—Fairlane,

Falcon
and
Montego

ly adjusted, check the starter en-

gagement circuit in all positions. The

circuit must be open in all drive posi-

tions and closed only in park and neu-

tral.

2.
Remove the four screws and

plates securing the selector lever

handle to the lever. Remove the

handle and detent control.

3.
Remove two screws from the

rear of the console top panel. Pull the

panel back to unhook it from the

front of the console and remove the

panel.

4.
Loosen the two combination

starter neutral and back-up light

switch attaching screws (Fig. 9).

5.
Move the selector lever back and
forth until the gauge pin (No. 43 drill)

can be fully inserted into the gauge

pin holes (Fig. 9).

6. Place the transmission selector

lever firmly against the stop of the

neutral detent position.

7.
Slide the combination starter

neutral and back-up light switch for-

ward or rearward as required, until

the switch lever contacts the selector

lever actuator. If an adjustment can

not be made by rotating the switch,

loosen the actuator lever attaching

bolt and adjust the lever (Fig. 9).

8. Tighten the neutral start switch

attaching screws. If the actuator lever

was adjusted, tighten the actuator

lever bolt to 6-10 ft-lbs.procarmanuals.com