1969 FORD MUSTANG axle

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

04-04-08
Rear Axle — Ford Light-Duty (WER)

04-04-08

E 1577-A

75—Pinion Bearing
Cup
Installation—Typical

2.
Remove
the
bolts that attach
the

ring gear
to the
differential case. Press

the ring gear from
the
case
or tap it

off with
a
soft-faced hammer.

PARTS REPAIR
OR

REPLACEMENT

Clean
and
inspect
all the
parts
as

outlined
in
Cleaning
and
Inspection,

Part 4-1, Section
3 of
this Shop
Man-

ual.
Before assembling
the
carrier,
re-

pair
or
replace
all
parts
as
indicated

by
the
inspection.
The
principle
re-

placement operations
are
covered
in

the following procedures.
All
other
re-

pair
or
replacement operations
are

performed during
the
Cleaning
and

Inspection, Part 4-1, Section
3
opera-

tions noted above,
or
during
the as-

sembly
in
this section.

PINION BEARING CUPS

Do
not
remove
the
pinion bearing

cups from
the
carrier casting unless

the cups
are
worn
or
damaged.

If
the
pinion bearing cups
are to be

replaced, drive them
out of the
carrier

casting with
a
drift.
Tap on the
side

opposite
the cup. Use
care
to
prevent

the cups from cocking
in the
carrier.

Install
the new
cups with
the
tool

shown
in Fig. 15.
Make sure
the
cups

are properly seated
in
their bores.
If a

0.0015-inch feeler gauge
can be
insert-

ed between
a cup and the
bottom
of

its bore
at any
point around
the cup,

the
cup is not
properly seated.

Whenever
the
cups
are
replaced,
the

cone
and
roller assemblies should also

be replaced.
DRIVE PINION
AND

GEAR
SET

Individual differences
in
machining

the carrier casting
and the
gear
set re-

quire
a
shim between
the
pinion rear

bearing cone
and the
pinion gear
to

locate
the
pinion
for
correct tooth

contact with
the
ring gear.

When replacing
a
ring gear
and pin-

ion
it
should
be
noted that
the
original

factory installed shim
is of the
correct

thickness
to
adjust
for
individual vari-

ations
in
both
the
carrier casting
di-

mension
and in the
original gear
set

dimension; therefore,
to
select
the cor-

rect shim thickness
for the new
gear

set
to be
installed, follow these steps:

1.
Use a
micrometer
to
measure

the thickness
of the
original shim
re-

moved from
the
axle
and use the
same

thickness upon installation
of the re-

placement carrier assembly
or
drive

pinion.
If
further shim change
is nec-

essary,
it
will
be
indicated
in the
tooth

pattern check.

2.
If the
original shim
is
lost,
sub-

stitute
a
nominal shim
for the
original

and
use the
tooth pattern check
to de-

termine
if
further shim changes
are re-

quired. Nominal shim thicknesses
is

indicated
in
Part
4-3,
Specifications.

A
new
ring gear
and
pinion should

always
be
installed
in an
axle
as a

matched
set
(never separately).
Be

sure
the
same identifying (matching)

number, painted, appears
on the
bolt

hole face
of the
ring gear
and on the

head
of the
drive pinion
(Fig. 16).

3.
After determining
the
correct

shim thickness
as
explained
in the

foregoing steps, install
the new
pinion

and ring gear
as
outlined under
As-

sembly which follows
in
this section.
MATCHED

GEAR
SET

IDENTIFICATION

E 1628-A

. ?6—Pinion
and
Ring Gear

Markings

3ress
Ro-

Tool

T57L-4221-A-1

DIFFERENTIAL

BEARING CONE

ANC ROLLER

|E 1579-A

PIG. 77—Differential Bearing

Installation

DIFFERENTIAL CASE,

BEARINGS,
AND
DRIVEN

GEAR

If
the
ring gear runout check
(be-

fore disassembly) exceeded specifica-

tions,
the
condition
may be
caused
by

a warped gear,
a
defective case,
or ex-

cessively worn differential bearings.

To determine
the
cause
of
excessive

runout, proceed
as
follows:

1.
Press
the
original bearings
on

the one-piece differential case hubs

without
the
ring gear installed.

2.
Place
the
differential bearing

cups
on the
bearing cone
and
roller

and
set the
differential case
in the car-

rier.

3.
Install
the
matched (marked)

bearing caps
and
adjusting nuts
as

outlined
in
steps
11
thru
14
under
In-

stallation
of
Drive Pinion
and
Differ-

ential Case which follows
in
this
sec-

tion.

4.
Tighten
the
left adjuster
nut
until

it just touches
the
bearing
cup
then

tighten
the nut two
notches beyond

the point where
it
first contacts
the

bearing
cup.
Rotate
the
differentialprocarmanuals.com

04-04-09
Rear Axle — Ford Light-Duty (WER)
04-04-09

case several revolutions in each direc-

tion while the bearings are loaded to

seat the bearings in their cups. This

step is important.

5. Again loosen the right nut to re-

lease the preload. Check to see that

the left nut contacts the bearing cup.

Using the dial indicator set-up shown

in Fig. 13, Part 4-1, adjust the preload

to 0.008 to 0.012 case spread for new

bearings or 0.005 to 0.008 for the

original bearings, if re-used.

6. Check the runout of the differen-

tial case flange with a dial indicator.

If the runout does not now exceed

specifications, install a new ring gear,

if the runout still exceeds specifica-

tions,
the ring gear is true and the

trouble is due to either a defective

casting or worn bearings.

7.
Remove the differential case

from the carrier and remove the side

bearings from the case.

8. Install new bearings on the case

hubs,
and again install the differential

assembly in the carrier without the

ring gear.

9. Check the case runout again with

the new bearings. If the runout is now

within limits, the old bearings were

excessively worn. Use the new bear-

ings for assembly. If the runout is still

excessive, the case is defective and

should be replaced.

ASSEMBLY OF AXLE

Refer to Part 4-1 of this Shop

Manual for Cleaning and Inspection

procedures before starting assembly

operations.

ASSEMBLY OF

DIFFERENTIAL CASE

1.
Place the ring gear on the differ-

ential case. Install the retaining bolts

and torque them to specification.

2.
If the differential bearings were

removed, press them on as shown in

Fig. 17.

3.
Insert the pinion gear shaft lock

bolt into the case (loosely).

INSTALLATION OF DRIVE

PINION AND

DIFFERENTIAL CASE

1.
Place the shim(s) and pinion rear

bearing cone on the pinion shaft.

Press the bearing and shim(s) firmly

against the pinion shaft shoulder (Fig.

18).

2.
Place a new pinion bearing pre-

load (collapsible) spacer on the pinion

shaft.
REAR BEARING

CONE AND

ROLLER
Press Ram

FIG. 18—Drive Pinion Bearing

Installation

3.
Lubricate the pinion rear bearing

with axle lubricant.

4.
Lubricate the pinion front bear-

ing with axle lubricant. Lubricate the

pinion front bearing cone and place it

in the carrier housing.

5.
Install a new oil seal in the car-

rier casting (Fig. 19).

6. Insert the drive pinion shaft (U-

joint) flange into the pinion seal and

hold it firmly against the pinion front

bearing cone. From the rear of the

carrier casting, insert the pinion shaft

into the flange.

7.
Apply a small amount of lubri-

cant to the washer side of the flange

nut and start the nut. Use a new nut.

Hold the flange with the tool shown in

Fig. 12 and tighten the pinion shaft

nut. As the pinion shaft nut is tight-

ened, the pinion shaft is pulled into

the front bearing cone and into the

flange.

As the pinion shaft is pulled into

the front bearing cone, pinion shaft

end play is reduced. While there is

still end play in the pinion shaft, the

flange and cone will be felt to bottom.

This indicates that the bearing cone

and flange have bottomed on the col-

lapsible spacer.

From this point, a much greater

torque must be applied to turn the

pinion shaft nut, since the spacer must

be collapsed. From this point, also,

the nut should be tightened very slow-

ly and the pinion bearing preload play

checked often, so that the pinion bear-

ing preload does not exceed the speci-

fied limits.

If the pinion shaft nut is tightened

to the point that pinion bearing pre-

load exceeds the limits, the pinion

shaft must be removed and a new col-

lapsible spacer installed. Do not de-

crease the preload by loosening the
/
Tool
-
T58L-4676-A

/ E
1581-A

FIG. 19—Installing Pinion Seal

E 1582-A

FIG. 20—Checking Pinion Bearing

Preload

pinion shaft nut. This will remove the

compression between the pinion front

and rear bearing cones and the col-

lapsible spacer and may permit the

front bearing cone to turn on the pin-

ion shaft.

8. As soon as there is preload on

the bearings, turn the pinion shaft in

both directions several times to seat

the bearing rollers.

9. Adjust the bearing preload to

specification. Measure the preload

with the tool shown in Fig. 20.

10.
Apply a thin coating of lubri-

cant on the bearing bores so that the

differential bearing cups will move

easily.

11.
Place the cups on the bearings

and set the differential case assembly

in the carrier casting.

If the gear set is of the non-hunting

or partial non-hunting type, assemble

the differential case and ring gear as-

sembly in the carrier so that the

marked tooth on the pinion indexes

between the marked teeth on the ring

gear as shown in Fig. 49, Part 4-2.

In almost every case of improper

assembly (gears assembled out of

time),
the noise level and probability

of failure will be higher than they

would be with properly assembled

gears.

When installing the hunting type

gear set (no timing marks), assembleprocarmanuals.com

04-04-10
Rear Axle — Ford Light-Duty (WER)

04-04-10

the differential case and ring gear as-

sembly in the carrier without regard

to the matching of any particular gear

teeth.

12.
Slide the case assembly along

the bores until a slight amount of

backlash is felt between the gear teeth.

Hold the differential case in place.

13.
Set the adjusting nuts in the

bores so that they just contact the

bearing cups.

14.
Carefully position the bearing

caps on the carrier casting. Match the

marks made when the caps were re-

moved (Fig. 21).

15.
Install the bearing cap bolts

and lockwashers. As the bolts are

tightened, turn the adjusting nut with

the tool shown in Fig. 21.

16.
If the adjusting nuts do not turn

freely as the cap bolts are tightened,

remove the bearing caps and again in-

spect for damaged threads or incor-

rectly positioned caps. Tightening the

bolts to the specified torque is done to

be sure that the cups and adjusting
.BEARING CAP IDENTIFICATION-j

MARKS
A

T57L-4067-A

E 1583-A

27—Bearing Cap Installation

nuts are seated. Loosen the cap bolts,

and torque them to only 5 ft-)bs be-

fore making adjustments. Refer to

part 4-1, Section 2 of this shop manu-

al for backlash and bearing preload

adjustment procedures.

17.
Clean the marking compound

from the gear teeth.

18.
Install both side bearing adjust-

ing nut locks (bolts) and torque them

to specification.
19.
Install the differential pinion

side gears and thrust washers.

20.
Install the rear wheel bearings

seals,
rear axle shafts, wheels and tires

and the axle carrier cover as outlined

under Part 4-3, Section 2, Rear Axle

Shaft, Wheel Bearing and Oil Seal

Replacement, Steps 10 through 19.

21.
Raise the axle all the way up.

Rdnove the safety support stands.

22.
Connect the track bar to the

mounting stud. Install the washer and

retaining nut, and torque the nut to

specification.

23.
Remove the oil seal replacer

tool from the transmission extension

housing. Install the front end of the

drive shaft on the transmission.output

shaft. Align the scribe marks on the

cups,
flange and drive shaft and con-

nect the rear end of the drive shaft to

the axle U-joint flange. Torque the re-

taining bolts to specification.

24.
Lower the vehicle.procarmanuals.com

04-05-01
Specifications

04-05-01

PART
4-5
Specifications

REAR AXLE RATIOS. GEAR AND CuDE IDENTIFICATION
-
COUGAR FALCON. FAIRLANE. MUSTANG AND MONTEGO

Identifi-

cation

Tag

WCY-R1

WCY-AJ2

WCZ-F1

WCZ-V

WDJ-C1

WDV-B

WDV-G

WDW-H

WDW-B1

WDW-C1

WDW-F

WDW-J

WDW-K

WDY-A1

WDY-B1

WDZ-B1

WDZ-E

WEA-A1

WEA-F1

WEB-F6

WEB-F6

WEB-H2

WEB-L

WEB-M

WEB-N

WEB-P

WEB-R

WEB-S

WEB-T

WEB-U

WEC-D5

WEC-E5

WEC-H

WEC-J

©2-
Pini

©Torque
Ring Gear

Diameter

(Inches)

7 1/4

7
1/4

8

8

8

7
1/4

7 1/4

7 1/4

8

8

8

8

8

8

8

8

8

8

8

9

9

9

9

9

8 3/4

9

9

9

9

8 3/4

9

9

9

8
3/4
Type
of

Differential®

Conventional

Conventional

Conventional

Conventional

Limited Slip

Conventional

Conventional

Limited Slip

Conventional

Conventional

Conventional

Conventional

Conventional

Conventional

Conventional

Limited Slip

Limited Slip

Limited Slip

Limited Slip

Conventional®

Conventional®

Conventional

Conventional®

Conventional®

Conventional

Conventional®

Conventional

Conventional

Conventional®

Conventional

Conventional®

Conventional®

Conventional®

Conventional
Axle

Ratio

2.83:1

3.08:1

3.00:1

2.79:1

3.00:1

2.83:1

3.20:1

3.20:1

3.00:1

3.25:1

3.00:1

2.79:1

2.79:1

3.00:1

3.25:1

3.00:1

3.00:1

3.00:1

3.25:1

3.00:1

3.25:1

2.75:1

3.50:1

3.00:1

3.00:1

2.75:1

3.00:1

3.25:1

3.25:1

3.25:1

3.00:1

3.25:1

3.00:1

3.00:1
No.
of
Teeth

Ring Gear

34

37

39

39

39

34

32

32

39

39

39

39

39

39

39

39

39

39

39

39

39

44

35

39

39

44

39

39

39

39

39

39

39

39
Pinion

12

12

13

14

13

12

10

10

13

12

13

14

14

13

12

13

13

13

12

13

12

16

10

13

13

16

13

12

12

12

13

12

13

13

on Unless Otherwise Noted ©Conventional
4 •
Pinion

Sensitive Locker
(4 •
Pinion) ©Limited Slip
4 -
Pinion
Identifi-

cation

Tag

WEC-K

WEC-L

WEC-M

WEC-N

WEC-R

WES-F

WES-G1

WES-M

WES-N

WES-P

WES-SI

WES-T1

WES-U

WES-AA

WES-AB

WES-AC

WES-AD

WFA-A

WFA-C

WFA-D

WFA-E

WFB-A

WFB-C

WFC-A

WFC-B

WFC-C

WFC-D

WFC-E

WFC-F

WFOS

WFC-K

WFC-G

WFD-A

WFD-B

WFD-C

WFD-H
Ring Gear

Diameter

(Inches)

9

9

8 3/4

9

9

9

9

9

8 3/4

8 3/4

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9
Type
of

Differential®

Conventional

Conventional®

Conventional

Conventional

Conventional®

Conventional®

Limited Slip®

Conventional®

Conventional

Conventional

Conventional®

Conventional

Conventional®

Conventional

Conventional

Conventional®

Conventional®

Traction Lok®

Traction Lok®

Traction Lok®

Traction Lok®

Traction Lok®

Traction Lok®

Traction Lok®

Traction Lok©

Traction Lok©

Traction Lok®

Traction Lok®

Traction Lok®

Traction Lok®

Traction LokCD

Traction Lok®

Traction Lok®

Traction Lok®

Traction Lok®

Traction Lok®
Axle

Ratio

3.00:1

3.25:1

3.25:1

3.25:1

3.50:1

3.00:1

3.25:1

3.25:1

3.00:1

3.25:1

2.75:1

2.75:1

3.50:1

3.00:1

3.25:1

3.00:1

3.25:1

3.25:1

3.25:1

3.25:1

3.00:1

3.25:1

3.25:1

3.50:1

3.91:1

4.30:1

3.91:1

4.30:1

3.91:1

3.50:1

4.30:1

3.00:1

3.50:1

3.91:1

4.30:1

3.25:1
No.
of
Teeth

Ring Gear

39

39

39

39

35

39

39

39

39

39

44

44

35

39

39

39

39

39

39

39

39

39

39

35

43

43

43

43

43

35

43

39

35

43

43

39
Pinion

13

12

12

12

10

13

12

12

13

12

16

16

10

14

12

13

12

12

12

12

13

12

12

10

11

10

11

10

11

10

10

13

10

11

10

12procarmanuals.com

04-05-02

Specifications

04-05-02

REAR AXLE RATIOS, GEAR AND CODE IDENTIFICATION -FORD, MERCURY AND METEOR

Identifi-

cation

Tag

WDC-AS4

WDC-AV4

WDC-CA4

WDC-CC4

WDC-CK4

WDC-CL4

WDC-CM4

WDC-CN

WDC-CR

WDL-W4

WDL-AA4
Ring Gear

Diameter

(Inches)

8
3/4

8
3/4

9

9

9

9

9

9

9

8
3/4

9
Type
of

Differential

Conventional

Conventional

Conventional

Conventional®

Conventional

Conventional®

Conventional®

Conventional®

Conventional®

Limited Slip

Limited Slip
Axle

Ratio

3.25:1

3.00:1

2.75:1

3.00:1

3.25:1

3.25:1

3.50:1

2.75:1

3.25:1

3.00:1

2.75:1
No.
of
Teeth

Ring Gear

39

39

44

39

39

39

35

44

39

39

44
Pinion

12

13

16

13

12

12

10

16

12

13

16
Identifi-

cation

Tag

WDL-AC4

WDL-AE

WDL-AF

WDL-AG

WDT-F4

WDT-R4

WDT-AL4

WDT-AM4

WDT-AN4

WDT-AS4

WER
-
A4

WER-C4
Ring Gear

Diameter

(Inches)

8
3/4

9

9

9

9
3/8

9
3/8

9
3/8

9
3/8

9
3/8

9
3/8

81/2

8
1/2
Type
of

Differential

Limited Slip

Limited Slip

Limited Slip®

Limited Slip®

Conventional

Conventional®

Conventional

Conventional®

Limited Slip©

Limited Slip

Conventional

Conventional
Axle

Ratio

3.25:1

3.25:1

2.75:1

3.25:1

2.80:1

3.25:1

3.25:1

3.50:1

3.25:1

2.80:1

3.10:1

2.80:1
No.
of
Teeth

Ring Gear

39

39

44

39

42

39

39

35

39

42

31

42
Pinion

12

12

16

12

15

12

12

10

12

15

10

15

©4
-
Pinion ©Equipped With Torsional Damper

REAR AXLE RATIOS, GEAR AND CODE IDENTIFICATION
-
LINCOLN CONTINENTAL

Identifi-

cation

Tag

WEG-C2

WEG-D2
Ring Gear

Diameter

(Inches)

9
3/8

9
3/8
Type
of

Differential

Conventional

Limited Slip
Axle

Ratio

2.80:1

2.80:1
No.
of
Teeth

Ring Gear

42

42
Pinion

15

15
Identifi-

cation

Tag

WEG-E2

WEG-F2
Ring Gear

Diameter

(Inches)

9
3/8

9
3/8
Type
of

Differential

Conventional

Limited Slip
Axle

Ratio

3.00:1

3.00:1
No.
of
Teeth

Ring Gear

39

39
Pinion

13

13

REAR AXLE RATIOS, GEAR AND CODE IDENTIFICATION -THUNDERBIRD
AND
CONTINENTAL MARK
III

Identifi-

cation

Tag

WGA-A

WGA-B
Ring Gear

Diameter

(Inches)

9
3/8

9
3/8
Type
of

Differential

Conventional

Conventional
Axle

Ratio

2.80:1

3.00:1
No.
of
Teeth

Ring Gear

42

39
Pinion

15

13
Identifi-

cation

Tag

WGA-C

WGA-D
Ring Gear

Diameter

(Inches)

9
3/8

9
3/8
Type
of

Differential

Limited Slip

Limited Slip
Axle

Ratio

2.80:1

3.00:1
No.
of
Teeth

Ring Gear

42

39
Pinion

15

13

CLEARANCE, TOLERANCE AND ADJUSTMENT SPECIFICATIONS (BY AXLE RING GEAR DIAMETER)

Description

Maximum Runout
of
Backface
of

Ring Gear

Differential Side Gear Thrust

Washer Thickness

Differential Pinion Gear Thrust

Washer Thickness

Drive Pinion Bearing Solid Spacers-

(9-3/8"
only)

6 spacers
in
increments
of

0.002
inches

14 spacers
in
increments
of

0.001 inches

Differential Bearing Preload

(Case spread across Differential)

New Bearings (All)

Original Bearings-

7
1/4"
Ring Gear

8 3/4"
& 9 3/8"
Ring Gear

8
1/2"
Ring Gear
Inches

0.003

0.030-0.032

0.030-0.032

0.466-0.476

0.477-0.490

0.008-0.012

0.003-0.005

0.005-0.008

0.006-0.010
Description

Nominal Pinion Locating Shim
•

8 3/4",
9" & 9 3/8"
Ring Gear

8
1/2"
Ring Gear

8" Ring Gear

7
1/4"
Ring Gear

Available pinion Gear Shims

in steps
of
.001":

8 3/4",
9"
& 9 3/8"

8
1/2"

7
1/4"

Backlash between ring gear
and

pinion teeth

Maximum backlash variation

between teeth

Maximum radial runout
of
U-joint

flange
in
assembly:

All except
9 3/8"

9 3/8"
Inches

0.015

0.030

0.022

0.017

0.010
0.029

0.022
0.038

0.008
0.024

0.0080.012

0.003

0.010-T.I.R.

0.005-T.I.R.procarmanuals.com

04-05-03
Specifications

04-05-03

SHIM PACK THICKNESS CHART TRACTION-LOK DIFFERENTIAL

Feeler

Gauge

Reading

0.001

0.002

0.003

0.004

0.005

0.006

0.007

0.008

0.009

0.010

0.011

0.012

0.013

0.014

0.015

0.016

0.017

0.018

0.019

0.020

0.021

0.022

0.023

0.024

0.025

0.026

0.027
Remove Shim(s)

From

Nominal

None

0.005

0.010

0.015

0.020

0.025
Total Req'd

Shim Pack

Thickness®

0.050

0.045

0.040

0.035

0.030

0.025
Feeler

Gauge

Reading

0.028

0.029

0.030

0.031

0.032

0.033

0.034

0.035

0.036

0.037

0.038

0.039

0.040

0.041

0.042

0.043

0.044

0.045

0.046

0.047

0.048

0.049

0.050
Remove Shim(s)

From

Nominal

0.030

0.035

0.040

0.045

0.050
Total Req'd

Shim Pack

Thickness ®

0.020

0.015

0.010

0.005

0.000

©Service Shims are available in 0.010" and 0.005" Thicknesses.

ADJUSTMENT TORQUE SPECIFICATION -(BY AXLE RING GEAR DIAMETERS

Description

Minimum torque required to tighten

pinion flange nut to obtain

correct pinion bearing preload

7 1/4" & 8 1/2"

8", 8 3/4" & 9"

9 3/8"

Pinion Bearing Preload-

collapsible spacer)®

Original Bearings 7 1/4"

8", 8 1/2", 8 3/4", 9"

New Bearings 7 1/4"

8", 8 1/2", 8 3/4", 9"

Pinion Bearing Preload-

(Solid Spacer) 9 3/8" Only
Torque

Lbs.
In.

6-12

8-14

17-32

22-32

15-35
. Lbs. Ft.

140®

175®

180-220
Description

Lockers Only • Minimum rotating

Torque required to turn axle

shaft and side gear with one

wheel on ground:

Limited Slip 7 1/4"

All other R. G. Sizes

Traction-Lok-All

Lockers only-Rotating Torques

required during bench check

after assembly:

Original Clutch Plates-

Limited Slip 71/4",

All other R. G. Sizes

Traction-Lok-(All)

New Clutch Plates-

Limited Slip 7 1/4"

All other R. G. Sizes

Traction-Lok-All
Torque

Lbs.
In.
Lbs.
Ft.

50

75

40

50 Min.

75 Min.

40 Min.

100-125

155-195

100-250G

©If pinion bearing preload exceeds specification before this torque is obtained, install a new spacer.

©With Oil Seal.

©Rotating torque may fluctuate up to 40 Lbs. Ft.procarmanuals.com