transmission JEEP DJ 1953 Workshop Manual

Jl

FOUR-SPEED TRANSMISSION

FIG.
Jl-7—SNAP
RING
AND
THRUST WASHER INSTALLATION—T-98 ONLY
1—
Thrust
Washer

2—
Snap
Ring

placing
the shaft in a vise (with
soft
metal covering the jaws) so that the threaded end of the shaft is
up.
Install
snap ring and thrust washer at the
forward
end of the
second-speed
gear position.
See Fig. Jl-7.
Install
thrust washer with the recessed side covering the snap
ring.

Note:
The second
speed
gear in the T-18 trans­ mission is a slide fit
onto
the mainshaft and
does

not contain roller bearings or a spacer.

On
model T-98 transmission, place a rubber band
around
the
second-speed
gear bearing surface on
the shaft.
Install
the thirty-four bearing rollers Fig.

Jl-3
around the shaft. See Fig. Jl-8.
Install
spacer on the shaft.
With
the tapered shoulder of the

second-speed
gear up, slide gear on the shaft far

enough
to hold the bearing rollers in place. Remove the rubber band and slide the gear down
onto
the

thrust
washer.
Install
the
rear
snap ring and the
blocking ring
onto
the tapered shoulder of the gear.
f.
Install
the
second-speed
synchronizer assembly
on the mainshaft.
Line
up the marks made at the
time of disassembly.
Install
the snap
ring.

g.
Install
the third-speed gear assembly on the
shaft with the tapered shoulder to the front.
Slide
the direct-and-third synchronizer assembly
onto
the mainshaft, lining up the marks made at
the time of disassembly.
Install
snap
ring.

h.
Install
main drive gear assembly with roller
bearings in place in front of case.
Install
mainshaft
FIG.
Jl-8—SECOND-SPEED
GEAR

ASSEMBLY—T-98 ONLY
1—
Spacer
3—Rubber
Band

2—
Bearing
Rollers
4—Thrust
Washer

assembly through top of case, making sure roller
bearings are not knocked out of place,
i.
Temporarily install main drive gear bearing

retainer
to support drive gear.
Install
snap ring on mainshaft bearing and press bearing on shaft

and
into case until snap ring is seated against case,

j-
Remove the main drive gear bearing retainer,
install
the oil slinger on the drive gear.
Install
the snap ring on the main drive gear bearing.
Then

press the bearing on the shaft and into the case.
Install
the thickest of the four available snap
rings that
will
fit into the
groove
on the main

drive
gear shaft.

k.
Slide main drive gear bearing retainer on the
shaft and hold tightly against transmission.
With

a
feeler
gauge,
measure the distance
between
the
retainer
and the case. Select gaskets that
will
be .003" to .005"
[0,076
a 0,127 mm.] thicker than
space
between
retainer and case.
Install
gaskets
and
retainer.

I.
Complete assembly of transmission.
Check

condition of
rear
oil seal and gaskets.
J1-6. Four-Speed
Transmission Control

Housing Reassembly
Reassembly of the control housing is the reverse of disassembly. Make sure lock pins are installed in
both shift forks.
Install
new expansion plugs in base of the housing. Inspect the transmission

breather
for damage and replace if necessary. 264

'Jeep'
UNIVERSAL SERIES SERVICE
MANUAL

Jl

FIG.
Jl-9—INCORRECT
OIL
SEAL POSITION J1-7.
Installing
4-Speed
Transmission

Install
the four-speed transmission in the reverse

order
of the removal, noting the following points:

When
installing the front adapter plate (Fig. Jl-1,

insert
the bearing retainer in the adapter plate and
position the adapter plate against the flywheel
housing.
With
the adapter plate cap screws tight, make sure the bearing retainer can be removed
freely. If not, relocate the adapter plate and tighten
again to
test
proper location of adapter plate.
When
installing
rear
adapter plate, be sure cap
screw heads do not protrude beyond the adapter
plate face or interfere with transfer case fitting
tightly against
rear
adapter plate.

When
installing transfer case gear on the trans-
FIG.
Jl-10—CORRECT
OIL
SEAL POSITION

mission
rear
splined drive shaft tighten the large
gear nut securely and insert cotter pin.
Sink
cotter

pin
well into nut
slots
so it
will
clear
P.T.O.
drive.

J1-8.
Adapter Plate
Oil
Seal
It
is important that the four-speed transmission
adapter plate oil seal be correctly installed to
prevent flow of lubricant from the transfer case
to the transmission. Should the lubricant level be
low in the transfer case and high in the transmission,
check the position of the oil seal. See Fig. Jl-9 and

Jl-10.
Correctly
positioned, the lip of the oil seal is
toward
the transfer case. Always replace the oil

seal
whenever it has been removed. 265

Jl

FOUR-SPEED
TRANSMISSION
Jl-9.
TRANSMISSION
SER¥ICE
DIAGNOSIS

SYMPTOMS

Lock
In Two Gears

Slips
Out of High Gear Transmission Misaligned with Bellhousing

End
Play in Main Drive Gear Damaged Pilot Bearing or Front Bearing.
Slips Out of
Second
Worn
Gear
Weak
Poppet
Spring
PROBABLE
REMEDY

Replace
Poppet
or Shift Levers
Align Transmission Case to Bellhousing and Bellhousing to Engine
Tighten Front Retainer Replace
Replace Replace

Noise
in Low Gear
Gear
Teeth Worn. Replace Gears
Shifting
Shoe
Bent Replace
Shoe
Lack
of Lubrication Drain and Refill

Grease
Leak into Bellhousing Gasket Broken Front Bearing Retainer......... Replace Transmission Main Drive Gear Oil Seal Replace

Jl-10.
TRANSMISSION
SPECIFICATIONS

HURRICANE
F4
ENGINE
4-SPEED

Vehicle:
CJ-5,
CJ-6

Warner
T98A

Type..
• Synchronous Mesh
4 Forward — 1 Reverse
Ratios: —
First
. .
6.398
to 1

Second
3.092
to 1

Third
1.686 to 1

Fourth
1.000 to 1

7.820
to 1

DAUNTLESS
V-6
ENGINE
4-SPEED

Vehicle:
Late
CJ-5 Only

Warner

Model T-18
Type Synchromesh
4 Forward — 1 Reverse
Ratios: —
First
4.02 to 1

Second
2.41 to 1

Third
1.41 to 1

Fourth
1.00 to 1
Reverse 4.73 to 1 266

'Jeep'
UNIVERSAL SERIES SERVICE
MANUAL

ft
TRANSFER CASE

Contents

SUBJECT
PAR.

GENERAL
. . .K-1

TRANSFER CASE REMOVAL
K-2
TRANSFER CASE DISASSEMBLY
K-3
Front
Bearing Cap K-4

Rear
Bearing Cap K-5

TRANSFER CASE REASSEMBLY.
. .K-6

TRANSFER CASE INSTALLATION
K-7
TRANSFER CASE LINKAGE
ADJUSTMENT
K-8

SERVICE
DIAGNOSIS
K-9

SPECIFICATIONS
.K-10

K-1. GENERAL
All
4-wheel-drive models are equipped with a
transfer
case to connect the power to the front
axle.
It is essentially a
two-speed
transmission
located at the
rear
of the standard transmission
and
provides a low and direct gear.

The
transfer case gears are controlled by the
driver

through
one shift lever.
Early
'Jeep'
Universal
Models with the F4-134
Hurricane
engine
are equipped with two transfer case shift control levers.

a.
On vehicles equipped with one transfer case

shift
lever, the transfer case shift lever has four
positions: 2WD
High,
4WD
High,
Neutral, and
4WD
low. The forward position of the lever 2WD

High
allows the
rear
wheels only to drive. The

first
rear
position (4WD High)
engages
the 4- wheel drive and provides high range 4-wheel drive.

The
second
rear
position (Neutral)
disengages
all power to the wheels and is used for stationary
power take-off operations. The last
rear
position
(4WD
Low) provides low range 4-wheel drive.

b.
On vehicles equipped with two transfer case

shift
levers, the transfer case front axle drive lever (left hand lever)
gives
a choice of 2-wheel or 4-
wheel drive. In the forward (out) position the
vehicle is in 2-wheel drive. Move the lever to the

rear
(in) position for 4-wheel drive operation.
The
4-wheel-drive
auxiliary-range
shift lever (right

hand
lever) has three positions; low, neutral, and
high.
The forward position (low)
gives
low-range
4-wheel drive. The center position (neutral) dis­
engages
all power to the wheels and is used for

stationary
power take-off operations. A built-in in­

terlock
prevents shifting into low range, 2-wheel
drive.
This
feature protects the
rear
axle from over­

load.
K-2.
Removal of
Transfer
Case

The
transfer case may be removed from the vehicle
without removing the transmission. Where both

transmission
and transfer case are to be removed
together,
refer to Section J. To remove only the

transfer
case from the vehicle, proceed as follows:

a.
Drain
transmission
and transfer case and replace

drain
plugs.

b.
Disconnect the brake cable.

c.
Disconnect front and
rear
propeller shafts at
the transfer case. See "Propeller Shafts and
Uni­
versal
Joints."

d.
Disconnect
speedometer
cable at transfer case. e. Disconnect the transfer case shift levers. On
vehicles equipped with two shift levers
loosen

set screw and remove pivot pin. Use a screw
driver

to pry shift lever springs away from shift levers.
Lift
levers from transfer case. On models equipped

with
a single shift lever remove pivot pin cotter

key,
and the adjusting rod attaching nut to remove

shift
lever. See Fig. K-4.
f. Remove cover plate on
rear
face of transfer case.

Remove
cotter key, nut and washer from trans­

mission
main shaft.
g. If possible, at this point remove the transfer case main drive gear from the transmission main

shaft.
If not possible, see
step
j below.

h.
Remove transfer case torque reaction support

bracket
bolt and nut.

i.
Remove transmission to transfer case bolts.
j.
Remove transfer case. If the transfer case main

drive
gear has not been removed in
step
g above,
proceed as follows:
Brace
the end of the trans­

mission
main shaft so that it cannot
move
in the
transmission,
pull
the transfer case to the
rear
to 267

TRANSFER
CASE

FIG.
K-1—TRANSFER
CASE
—
TWO
SHIFT
LEVERS

1— Companion Flange
2—
Brake
Drum 3— Emergency Brake
4—Operating Lever
5—
Oil
Seal 6—
Lever
Stud 7—
-Rear
Cap
8— Shims

9—
Screw
10—
Lockwasher
11— Bolt
12—
-Rear
Cover
13—
Gasket

14—
Lock
Plate
15—
Transfer
Case
16— Shift Rod 17—
Poppet
Plug

18—Poppet
Spring 19—
Poppet
Ball

20— Interlock
21—Gasket 22—
Front
Cap
23—
Breather
24— Shift Lever Spring

26—Shift
Lever
25*A—Shift Lever
(used
with
4-speed

transmission) 26— Shift Lever Knob
27— Shift Lever
27A—Shift Lever
(used
with
4-speed
transmission)
28—
Pivot
Pin
29—
Lubrication
Fitting
30— Set Screw
31—
Oil
Seal 32—
Front
Yoke
33—
Gasket
34— Bolt

3
5—Lockwasher
36— Shift Rod
37—
Shift
Fork
38— Shift
Fork

39—
Filler
Pipe Plug
40—Mainshaft Gear 41— plain Washer
42—
Thrust
Washer
43—
Intermediate
Gear
44—
Snap Ring

45—
Bearing

46—
Nut 47— Washer
48— Output Clutch Shaft
49—
Output Clutch Gear
50— Snap Ring 51—
Thrust
Washer
52— Output Shaft Gear
53— Sliding Gear
54— Bushing
55— Output Shaft
56— Cone and Rollers

57—
Bearing
Cup
58—
Speedometer
Gear 59—
Needle
Bearings 60—Bearing Spacers
61—
Intermediate
Shaft
62—
Drain
Plug 63—
Gasket

64—Nut
65—
Bottom
Cover
66—
Sleeve

67—
Speedometer
Gear 68— Bushing
69—
Gasket
70— Bolt

71—Bolt
72—
Hex Nut
72— Bolt
73— Bolt
74—
Lockwasher

75— Nut
76— Output Shaft Seal 268

K

TRANSFER
CASE

FIG.
K-3—UNIVERSAL JOINT FLANGE
PULLER
1—
U-Joint
Flange
Puller
W-172

2—
V-Joint
Flange Holding
Wrench
C-3281

FIG.
K-4—TRANSFER CASE SHIFT LINKAGE
CJ-5A,
CJ-6A

1—Linkage
Adjustment
loosen
the gear and remove the gear. When separat­
ing the two housings, use care that the transmission

main
shaft bearing, which bears in both housings,

remains
in the transmission case.

K-3.
Transfer
Case
Disassembly
•
Refer to Fig. K-1, K-2.

To
remove the gears and bearings from the trans­
fer
case on the bench, the following procedure is
recommended.

a.
Remove output shaft nuts and washers using

Yoke
Holding
Wrench,
C-3281. Remove
rear
out­
put shaft companion flange with brake drum (if
FIG.
K-5—BEARING CONE REMOVING WEDGE

1— Wedge W-139

2—
Cone
and
Roller
so equipped) and front output shaft yoke, using

Tool
W-172.

b.
Remove cover bolts, lockwashers, and
bottom

cover.

c.
Remove the lockplate screw, lockwasher, and

lock
plate.

d.
Use a brass punch to drive out intermediate shaft to the
rear
of the case. Do not
lose
the thrust
washers located at each end of the gear shaft.
e. Remove the intermediate gear, two thrust

washers,
needle
bearings, and spacers,
thru
the
bottom
of the case.
f. Remove the
poppet
plugs, springs, and balls on both sides of front bearing cap. Shift front wheel
shift lever to
engaged
position (shaft forward).
g. Remove the screws, lockwashers, holding the front bearing cap. Remove the cap as an assembly

including
the clutch shaft, bearing, clutch gear,
fork,
and shift rod. Use care not to
lose
the inter­

lock
which floats
between
the shift rods.

h.
Remove the screws, lockwashers holding the

brake
backing plate assembly (if so equipped)
and
rear
output cap with
speedometer
gear as­
sembly. Remove entire unit as an assembly.

i.
Use a rawhide hammer to drive against the front
end of output shaft to drive the
rear
bearing cup

from
the case. Use Tool W-139, as shown in Fig.
K-5,
to
wedge
front bearing
cone
and roller as­
sembly from its seat on the shaft. Place Tool
W-141,
Fig. K-6, on the output shaft
between
the
front bearing and output shaft gear. Use a rawhide

hammer
to drive against the
rear
end of the output shaft to remove front bearing cup from the case.

Loosen
snap ring and slide it forward on the shaft.

Drive
the shaft
thru
the
rear
of the case. As the shaft is removed, gears, snap
ring,
and thrust washer

will
remain in the case and can be removed from 270

'Jeep*
UNIVERSAL
SERIES
SERVICE
MANUAL

K
ment, the shaft should have .004" to .008"
[0,102

a
0,203
mm.] end play. Adjustment is made by
selective
shim installation
between
the cap and the
case. Shims .003", .010" and .031" [0,076,
0,254,

0,787
mm.] in thickness are available for this ad­
justment. Do not install the rear cap oil seal until
the bearings are correctly adjusted. Both the front
and
rear oil seals may be installed with oil seal

driver
Tool W-143, shown in Fig. K-12.

When
installing the end yokes on the output shafts,
inspect for the presence of
felt
seals in each oil
seal guard. (The oil seal guard is a part of each
yoke assembly.) Felt seals should be installed in the oil seal guards if
they
are not present. When
installing the shift
rail
oil seals in the front bear­
ing cap, it is necessary to protect the seals against
damage when passing over the shift
rail
notches.
Protect them with the thimble, and install them with the driver, Tool W-130, shown in Fig. K-9.

K-7.
Transfer Case Installation

The
installation of the assembly in the vehicle is
the reverse of the removal operation covered in
Par.
K-2.

If
the transmission was removed from the vehicle,
lubricate the pilot bearing and also lubricate the
transmission and transfer case as outlined in the

"Lubrication
Section". Be sure that the clutch pedal has %"
[19,05
mm.] free travel as outlined

in
the
"Clutch
Section".

K-8.
Transfer Case Linkage Adjustment

Adjust
the link to provide
xh"
[12,7 mm.] clear­
ance
between
the floor pan and the shift lever
bend when operating in four wheel drive low
position. Refer to Fig. K-4.

K-3.
TRENSFER
CESE
SERVICE
DIAGNOSIS

SYMPTOMS PROBABLE REMEDY

Slips
Out of
Gear (High-Low)
Shifting
Lock
Spring Weak Replace Spring

Bearing
Broken or Worn Replace
Shifting
Fork
Bent Replace

Slips
Out of
Front Wheel Drive
Shifting
Lock
Spring Weak. Replace

Bearing
Worn or Broken Replace

End
Play in Shaft. . . ..... Adjust Shifting
Fork
Bent.. Replace

Hard Shifting
Lack
of
Lubricant
Drain
and
Refill

Shift
Lever
Stuck on Shaft Remove, Clean and Lubricate
Shifting
Lock
Ball
Scored Replace
Ball

Shifting
Fork
Bent Replace
Fork

Low
Tire
Pressure Inflate

Grease Leak
at
Front
or
Rear Drive
Grease
Leak
at Covers. Install New Gaskets

Grease
Leak
between
Transmission and Transfer Cases Install New Gaskets

Grease
Leak
at Output Shaft Install New Oil Seal

K-10.
TRANSFER
CESE
SPECIFICATIONS

Transfer
Case:
All
Models

Spicer

18

On
Floor

Gear
Ratio: 1.00 to 1
2.46 to 1 273

N

REAR
AXLE a.
Place the transmission in neutral.

b.
Raise one wheel off the floor and place a block

in
front and at the
rear
of the
opposite
wheel.

c.
Apply a torque wrench to the axle shaft nut of
the elevated wheel.

d.
Turn
wheel with torque wrench. Disregard

breakaway
torque and observe torque required to
continuously
turn
wheel smoothly. Torque should
read
40 lb-ft [5,53 kg-m.] or more.

N-23. Powr-Lok
Differential Disassembly
/
and Reassembly

Refer
to
Figs.
N-38 and N-39.
The
procedure for overhauling disc type
Powr-Lok

differentials is as follows:

a.
Remove axle shafts following procedure de­
scribed
in Par. N-2.

b.
Remove housing cover and gasket.

c.
Remove the
Powr-Lok
differential from the axle.
Do not remove the ring gear or bearing
cone
and

rollers
unless replacement is to be made.
Mark
the hearing cups so they may later be reassembled

with
the same bearing cones.
Mark
the differential
case halves for correct alignment at reassembly.
Each
pinion mate cross shaft should also be marked
so that each pin cam surface
will
match with the
same
V-ramp
in the case when reassembled.

d.
Separate the case halves. e. Remove the disc and plate
sets.
The illustration
(Fig.
N-39) shows the arrangement of plates and

discs.
When reassembling unit, discs and plates must be reinstalled in this arrangement. Be sure
to keep in mind which way the set
will
face toward the case.

^®(j)(j)CD©
® /'Ml
I
11
11 v

FIG.
N-39—PLATE
ASSEMBLY
ORPER
A—Model
44
B—Model
27 1—
Case
5—Disc

2—
Belleville
Plate
6—Thin
Plate

3—
Belleville
Disc
7—Sidegear
Ring

4—Plate
8—Side
Gear
f. Remove the pinion mate cross shafts, bevel
pinion mate gears, bevel side gears, and side gear

rings.

g.
Clean
all parts thoroughly in kerosene and dry

with
compressed air.

h.
Inspect all parts. Replace any items which ap­

pear
to be worn or damaged.

i.
Inspect the plate surfaces of the case halves, the
side gear rings, and the clutch friction plates and
discs for excessive wear or scoring.

j.
Inspect the pinion mate shaft and ramp
sur­

faces on the case for excessive wear and pitting,

k.
Inspect the pinion gear races that bear on the
side gear rings.

I.
Inspect the corresponding surfaces on the side
gear rings.

m.
Inspect the clutch plates and discs for cracks

and
distortion. In the
event
one or more of the

clutch
plates or discs
needs
replacing, replace the
entire stack of plates and discs on each side of
the pinions. These stacks are supplied in
sets.

The
differential case halves are not serviced. Should replacement be required, it is necesary to replace
the complete differential.

n.
Assemble the clutch friction plates, clutch
fric­

tion discs, and dished plates on the splined hub of each bevel side gear. Make sure the plates and
discs are installed in the proper relationship as shown in Fig. N-39. The dished plates in the plate

and
disc set are always assembled with the convex
side toward the case. As each part is reassembled

in
its proper position, it is necessary that it be lightly coated with
Powr-Lok
lubricant,

o.
Place each differential case
half
on its side and
install
the side gear rings with the plates and discs
assembled. The side gear ring
will
rotate with a slight drag when properly located in the case,
p.
With
the ring gear flange
half
of the differential
case in an upright position, assemble the bevel side gears, pinion mate cross shafts, and bevel pinion
mate gears.
Install
the remaining case
half
on the
ring
gear flange half. Make sure that all markings
coincide.

q.
Install
the differential case
bolts
and
turn
them

in
a few threads.

r.
Using axle shafts from the vehicle, align the
splines of the side gear, and the side gear
ring,

s.
With
these
axle shafts in position, tighten the

differential
case
bolts
evenly. Torque 35 to 45 lb-ft. [4,84 a 6,22 kg-m.].
t. Remove the axle shafts.

u.
Check
for proper assembly.
Each
pinion mate
cross shaft should be tight on its
ramp.
If there is

clearance
between
the cross shaft and the
ramp,

the clearance should be no more than .005" [0,127 mm.].

This
clearance should be equal on all four cross
shaft ends.
v. Reinstall the unit in the axle.

w.
Install
axle shafts as described in Par. N-2.
Other
service operations such as ring gear and
pinion replacement, or pinion and bearing adjust­ ments, are performed in the same manner as de- 302

'Jeep*
UNIVERSAL
SERIES SERVICE
MANUAL

N
scribed
in
Pars.
N-ll through N-l9 for standard
axles, with the exception of the following torque
recommendations. Torque the differential case
bearing
cap screws 70 to 90 lb-ft. [9,7 a 12,4 kg-m.]

and
the cover screws 15 to 25 lb-ft. [2,1 a 3,4
kg-m.].
The ring gear screws on axles with Powr-

Lok
differentials should be torqued as follows:

Model
30 and 44 axles 35 to 55 lb-ft. [4,84 a 7,60 kg-m.].

N-24. TRAC-LOK DIFFERENTIAL
As
optional equipment
Trac-Lok
Model 44 differen­
tial
is available on all Jeep Universal vehicles equipped with semi-float flanged axle shafts.
A
conventional differential transmits all of the
ring
gear torque through the differential gears to the axle shafts. Torque is at all
times
equal on the axle shafts, and if one wheel slips, the other wheel

can
only put out as much torque as the slipping
wheel.

The
Trac-Lok
differential is similar,
except
that

part
of the torque from the ring gear is trans­ mitted through clutch packs
between
the side gears

and
differential case. The multiple disc clutches

with
radial
grooves
on the plates and concentric
grooves
on the discs are
engaged
by a preload

from
Belleville springs, plus separating forces from
the side gears as torque is applied through the
ring
gear.

The
Trac-Lok
construction permits differential action when required for turning corners and trans­mits equal torque to both
wheels
when driving

straight
ahead. However, when one wheel tries to spin due to leaving the ground, a patch of ice,
etc., the clutch packs automatically provide more
torque to the wheel which is not trying to spin.
It
can be
seen
then that the
Trac-Lok
differential
resists wheel spin on bumpy roads and provides
more pulling power when one wheel tries to slip.
In
many cases of differences in traction, pulling
power
will
be automatically provided until both
wheels
start to slip.

In
diagnosis of vehicle operators' complaints, it
is important to recognize two things:

a.
If, with unequal traction, both
wheels
slip, the

Trac-Lok
has
done
all it can possibly do.

b.
In extreme cases of differences in traction, the
wheel with least traction may spin after the
Trac-

Lok
has transferred as much torque as possible
to the non-slipping wheel.
N-25.
Lubrication

The
Trac-Lok
differential requires a special
lubri­

cant
and ordinary multipurpose gear lubricants

MUST
NOT be used. Use only 'Jeep* Differential
Oil,
Part
No. 94557.

Trac-Lok
differential may be cleaned only by disassembling the unit and wiping with clean rags. Do not flush the
Trac-Lok
unit.

Note:
The
Trac-Lok
differential is serviced at the
same time intervals as the standard differential.
N-26.
Trouble
Symptoms

If
noises
or roughness, such as chatter, are present
in
turning corners, the probable cause is incorrect

or
contaminated lubricant.
Before any differential is removed and disassem­
bled for chatter complaints, the correctness of
lubri­

cant
can and should be determined.

A
complete
lubricant
drain,
and
refill
with specified

Limited
Slip Differential lubricant
will
usually
correct
chatter.

The
following procedure is recommended to ensure

complete
removal of old lubricant.

a.
Warm
the lubricant by vehicle road operation,

or
5 minutes of operation in gear at 30 mph with
both
wheels
off the ground on a hoist.

Caution:
Never place the transmission in gear with
the
engine
running when only one wheel of a

Limited
Slip Differential equipped vehicle is raised.
The
vehicle might drive itself off the
jack
and produce damage or
injury.

b.
Drain
lubricant while
warm.
Remove
drain
plug

or
cover to
drain
completely. If cover is removed,

it
may be necessary to replace gasket at this time.

c.
Refill
axle with specified
Limited
Slip Differen­

tial
lubricant.

d.
Operate the vehicle for approximately ten miles
[16,09
km.], making at least ten figure 8 turns
to flush the old lubricant out of the clutch packs.

e.
Repeat
steps
b, c, and d, making sure to replace
the cover gasket if required in
step
c.
f. It is possible that slight chatter, requiring ad­
ditional
vehicle operation, may remain after
step
e. If chatter persists after 100 miles
[160,9
km.]
of vehicle operation, or remains severe after
step

e above, disassembly and repair
will
be necessary.
N-27.
Unit
Inoperative

Proper
performance and capabilities of
Limited
Slip
Differentials are
often
misunderstood. No
precise
methods
of measuring
Limited
Slip Dif­

ferential
performance are generally available in the field. A functioning unit can be determined by
relatively
simple vehicle operational
tests,
as
follows:

a.
Place one wheel on
good
dry pavement, and the
other on ice, mud, grease, etc.

b.
Gradually
increase
engine
rpm to obtain maxi­

mum
traction
prior
to "break-a-way." The ability
to
move
the vehicle
effectively
will
demonstrate

proper
performance.

c.
If extremely slick surfaces, such as ice or grease,

are
used
some
question may exist as to proper per­
formance at
step
b. In
these
extreme cases a prop­

erly
performing
Limited
Slip Differential
will
pro­
vide greater "pulling" power by lightly applying
the parking brake.

N-23.
Trac-Lok
Differential Disassembly
and
Reassembly

It
is recommended that the
complete
axle assembly
be removed from the vehicle, when it
becomes
necessary to remove the
Trac-Lok
from the hous­

ing.
Refer to Par. N-3 and N-12 for removal of axle shafts and differential case from axle housing. 303

m

REAR AXLE
c. Attach the brake line
hose
at tee fitting on top
of housing.

d.
Attach parking brake cables at rear of brake
backing plate. DJ
models
only.
e. Connect the shock absorbers at the axle mount­
ing pads.
f. Connect the propeller shaft at the rear universal
joint.
g. Adjust and bleed brakes. (See Section P).

h.
Install
wheels
and lower vehicle to floor.
i.
Check parking brake as described in Section P.

j.
Fill
the axle housing with the proper lubricant.

For
correct lubricant refer to the
Lubrication
Chart.

N-34.
TROUBLE
SHOOTING

The
following problems can be present with either the conventional differential,
Powr-Lok
or
Trac-
Lok
differential.
N-35. Backlash

Excessive
backlash in the vehicle drive line may be the results of
excessive
backlash in the trans­
mission, propeller shaft spline, universal joint, ring gear and pinion, the axle shaft spline, or the dif­
ferential.
Excessive
backlash in the differential may be meas­

ured
as follows:
a.
Jack
up one rear wheel.
b. Put the transmission in gear.
c. Measure the travel of the jacked-up wheel on
a
10"
[25,40
cm.] radius from the wheel center.

This
total
movement
should not
exceed
IVi" [3,17 cm.] in a new unit. In order to restrict the

backlash
to the axles only, make sure that the
yoke of the propeller shaft
does
not
move
during
the check.

d.
If all causes of backlash mentioned
above
have

been
eliminated with the exception of the differen­

tial
and that still
exceeds
the maximum allowable
movement, overhaul the differential.
N-36.
Rear
Wheel
Noise

Looseness of the rear axle shaft nut on semifloat- ing tapered rear axles may produce a clicking or
creaking
noise.
This
noise
can usually be
stopped

by torquing the wheel hub nut 150 to 175 lb-ft. [20,7 a 24,2 kg-m.]. If the condition has continued
for
some
time, slight wear may have resulted allow­
ing the
noise
to persist. In this case, coat the hub,
key, and keyway on tapered axle shafts with white
lead and torque the nut as specified. If the
noise
persists after this treatment, replace the worn parts.

N-37.
SERVICE DIAGNOSIS

SYMPTOMS

Axle
Noisy on Pull and
Coast
Excessive
Back
Lash
Bevel
Gear
and Pinion. . . . . Adjust

End
Play Pinion Shaft Adjust

Worn
Pinion Shaft Bearing Adjust
Pinion
Set too Deep in Bevel
Gear
too Tight..... Adjust

Wrong
Lubricant
Being Used
(Powr-Lok
or
Trac-Lok
Differential) . Replace

Axle
Noisy on
Pull
Pinion
and Bevel
Gear
Improperly Adjusted Adjust

Pinion
Bearings Rough....................... Adjust

Pinion
Bearings Loose Adjust

Axle
Noisy on Coast
Excessive
Back
Lash
in Bevel
Gear
and Pinion. . . Adjust

End
Play in Pinion Shaft. . Adjust

Improper
Tooth Contact.
....................
Adjust
Rough Bearings Replace

Back
Lash
Worn
Differential Pinion
Gear
Washers Adjust
Excessive
Back
Lash
in Bevel
Gear
and Pinion. . . Adjust

Worn
Universal Joints Replace
PROBABLE REMEDY

310