1953 JEEP CJ service

'Jeep'
UNIVERSAL
SERIES
SERVICE
MANUAL

J
flat washer, lock washer and nut.

q.
Check
the
complete
transmission for operation.

r.
Install
transmission case cover.

J-15.
T14A
TRANSMISSION
The
T14A is a three
speed
fully synchronized (all

forward
gears) transmission with helical drive gears
throughout.

The
main drive gear is supported by a
ball
bearing at the front end of the transmission case and is
piloted at its front end in an oil impregnated bush­
ing mounted in the crankshaft.

The
front end of the mainshaft is piloted in a row
of
roller
bearings set
into
the hollow end of the main

drive
gear and the
rear
end is
carried
by a
ball

bearing
mounted in the
rear
transmission case.
The
counter gear is
carried
on a single row of

rollers
at both ends. The reverse idler gear is
carried

on a single row of rollers in the center.
Thrust
is

taken
on thrust washers located
between
the
ends

of the counter and reverse idler gear and the thrust
bosses
in the case.

The
three forward gears (low, second, third) are

fully
synchronized. The synchronizer assemblies
consist of
clutch
hubs, clutch
sleeves,
clutch springs,

and
three synchronizer plates and are retained on
the mainshaft by a
select
fit snap
ring.
The
shift is manual through a cane shift lever and
interlock
assembly to the
rearward
shift fork
operating low and reverse gear and to the forward
shift fork operating second and
third
gear.
J-16.
TRANSMISSION
DISASSEMBLY
—
T14A

Refer
to Fig. J-13.

a.
If the transfer case is attached, separate it from
the transmission by removing the five capscrews
and
lockwashers.

b.
Remove cane shift housing cover and gasket

from
top of transmission case. The shift housing
cover can be disassembled if necessary, at this
point, by removing the shift
rails,
poppet
balls,

springs,
and shift forks. Refer to Fig. J-14.

c.
Remove nut and flat washer securing transfer case drive gear on the mainshaft. Remove transfer case drive gear, adapter, and spacer. Refer to

Fig.
J-15.
FIG.
J-15—TRANSFER
CASE
DRIVE

GEAR
ASSEMBLY
1—
Bearing
Adapter

2—
Bearing
Spacer

3—
Transfer
Case
Drive
Gear
4—
Flat
Washer 5— Nut
12885

FIG.
J-16—REMOVING
MAIN
DRIVE
GEAR
BEARING
1—W-329 Puller

d.
Remove main drive gear bearing retainer and
gasket. e. Remove main drive gear and mainshaft bearing snap rings.
f. Remove the main drive gear and mainshaft
bearings using bearing puller set W-329. Refer to

Figs.
J-16 and J-l7.
FIG.
J-17—REMOVING
MAINSHAFT
BEARING

1—W-329
Puller g. Remove main drive gear from transmission case.

h.
Remove mainshaft and gears as an assembly,
through the case cover opening as shown in Fig.

J-18.

i.
Remove the lockplate by tapping lightly on the
front end of the countershaft and reverse idler
shaft. Remove lockplate from
slots
in shafts. Refer
to
Fig.
J-19.

j.
Using Tool W-335, drive the countershaft
rear­

ward,
out of the case, as shown in Fig. J-20. The countershaft gear assembly
will
drop to the
bottom

of the case. Using Tool W-335
will
ensure that the

roller
bearings
will
remain in the countershaft gear
hub and may be removed as an assembly. 251

'Jeep'
UNIVERSAL SERIES
SERVICE
MANUAL

FIG.
J-23—REMOVING-INSTALLING LOW
CLUTCH
HUB
SNAP
RING 1— Mainshaft
2— Snap
Ring

3—
Snap
Ring
Groove 4—
Low
Synchronizer Assembly

J-17. DISASSEMBLY SYNCHRONIZER
ASSEMBLIES

Important:
Should a synchronizer assembly
(either low-and-reverse or second-and-high) be re­
placed for any reason on a cane shift transmission,
the shift fork that operates the synchronizer being
replaced must have an identifying letter "A" ap­ pearing just under the shaft
hole
on the side

opposite
the pin. If the letter "A"
does
not appear
on the existing fork, it must be replaced with a fork that has a letter "A" appearing thereon.
FIG.
J-24—SECOND-THIRD SYNCHRONIZER
ASSEMBLY
Refer
to Fig. J-24.

Second-Third
Synchronizer Unit.

a.
Remove springs (one on each side of unit). b.
Mark
sleeve
and hub
before
separating to en­
sure proper installation at time of assembly.
c. Remove hub from
sleeve.

d.
Remove the three synchronizer plates from third

speed
side of the hub. e.
Clean
and inspect synchronizer assembly parts.
f. Assemble synchronizer in reverse order of dis­ assembly, making certain the two synchronizer

spring
openings
are installed 120° of each other,
with spring tension
opposed.

Low
Synchronizer Unit.

Refer
tc- Fig. J-25.
The
low synchronizer assembly is serviced in the
same manner as second-third with exception of one
synchronizer spring.
12853

FIG.
J-25- -LOW SYNCHRONIZER
ASSEMBLY
1—
Synchronizer
Spring (2)
2—
Clutch
Hub

3—
Clutch
Sleeve
4— Shifter Plate
1
—Clutch
Hub
2— Shifter Plate

3—
Synchronizer
Spring (1)
4—
Clutch
Sleeve

J-18.
TRANSMISSION
CLEANING
AND
INSPECTION

Refer
to Fig. J-13.

a.
Wash transmission case inside and
outside
with cleaning solvent.
b.
Check
bearing and shaft bores. Inspect the case
for
cracks.
Check
the front and
rear
faces
and dress off any burrs with a fine
mill
file. If cracks are
found and bores are not ture, replace the case.
c.
Clean
and inspect all gears and bronze blocking
rings for
cracks,
chipped or cracked
teeth,
or ex­ cessive wear of the
teeth.

Note:
Whenever any transmission gear requires
replacement, the gear with which it
meshes
should
also be replaced.

d.
Inspect all bearings or bushings for wear or damage.
e.
Check
the second-third, and low synchronizer clutch
sleeves
making certain
they
slide freely on the clutch hub. 253

'Jeep*
UNIVERSAL SERIES SERVICE
MANUAL

J

FIG.
J-29—MAIN
DRIVE GEAR

ROLLER
BEARINGS INSTALLED
1—
Roller
Bearings 2— Cutaway
Main
Drive
Gear
I.
Install main drive gear and mainshaft bearings
using bearing installer set W-331
together
with a
thrust yoke Tool W-334 to prevent
damage
to the
synchronizer clutch. Install thrust yoke Tool.W-334
into
the
second
speed
gear
groove
and
between
the
main drive gear
(steel)
clutch
teeth
and bronze
synchronizer ring. Use
both
bearing drivers (W-331, SP-5364) and a backup block when driving
bearings
into
position, as shown in Figs. J-31 and J-32.
m. Install main drive gear and mainshaft bearing
snap rings.

Note:
The mainshaft bearing snap ring is .010"
[0,254
mm.] thicker than the main drive gear bear-
12882

FIG.
J-31—INSTALLING
MAIN
DRIVE GEAR BEARING

1—
Tool
SP-5364 Short Driver 2—
Tool
W-334 Thrust Yoke
3—
Tool
W-331 Long Driver 4— Wood Block

FIG.
J-32—INSTALLING
MAINSF
BEARING
1— Wood Block
2—
Tool
W-331 Long Driver
3—
Tool
W-334 Thrust Yok -
4—
Tool
SP-5364 Short T

FIG.
J-30—INSTALLING
MAIN
DRIVE GEAR ASSEMBLY
1—
Oil
Retainer Washer (Slinger)
2—
Main
Drive
Gear

3— Mainshaft
FIG.
J-33—MAIN
DRIVE GEAR BEARING
RETAINER
OIL
SEAL
255

'Jeep*
UNIVERSAL
SERIES
SERVICE
MANUAL

J J-20
TRANSMISSION
SERVICE
DIAGNOSIS

SYMPTOMS
PROBABLE
REMEDY

Lock
in Two
Gears
Replace
Poppet
or Shift Levers

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 Replace
Weak
Poppet
Spring 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 Align Transmission Case to Bellhousing
and Bellhousing to Engine
Tighten Front Retainer
Replace
J-21.
TRANSMISSION
SPECIFICATIONS

HURRICANE
F4
ENGINE
3-SPEED

Vehicle:
CJ-3B,
CJ-5,
CJ-5A,

CJ-6,
CJ-6A
DJ-5,
DJ-6
Make
Type

Speeds

Ratios: —
First
Second

Third

Fourth
Warner

T90C

Synchronous Mesh
3 Forward — 1 Reverse
3.339
to 1 1.551 to 1 1.000 to 1
Warner

T96

Synchronous Mesh
3 Forward — 1 Reverse
2.605
to 1 1.630 to 1
1.000 to 1
Reverse
Interlock
Poppet
Clearance. . .
3.798
to 1

3.536
to 1
.001" to .007"

[0,025
a 0,178 mmJ

DAUNTLESS
V-6
ENGINE
3-SPEED

Vehicle:
CJ-5,
CJ-6,
CJ-5A,
CJ-6A

DJ-5,
DJ-6
Late
CJ-5, CJ-6
Make
Warner
Warner Warner

Model
AS7
T86AA

AS9
T86AA
T14A

Type..
Synchromesh
Synchromesh Synchromesh

Speeds
3 Forward — 1 Reverse 3 Forward — 1 Reverse 3 Forward — 1 Reverse
Ratios: —
First
2.798
to 1
2.798
to 1
3.100 to 1

Second
1.687 to 1 1.687 to 1 1.612 to 1

Third
1.000 to 1
1.000 to 1 1.000 to 1
Reverse
3.798
to 1
3.798
to 1 3.100 to 1 257

'Jeep'
UNIVERSAL
SERIES
SERVICE
MANUAL

Jl
FOUR-SPEED
TRANSMISSION

Contents

SUBJECT
PAF.

GENERAL.
Jl-1

FOUR-SPEED
TRANSMISSION
REMOVAL.
Jl-2
Four-Speed Transmission
Disassembly
.
Jl-3 Four-Speed Transmission Control Housing
Disassembly
Jl-4
Four-Speed Transmission Reassembly Jl-5
SUBJECT
PAR.
Four-Speed Transmission Control Housing
Reasse mbly Jl-6

Transfer
Case Adapter Plate Oil Seal .
.
Jl-8
Four-Speed Transmission Installation Jl-7

FOUR-SPEED
TRANSMISSION
SPECIFICATIONS.
.
.
Jl-10

SERVICE
DIAGNOSIS
Jl-9 10771

FIG.
Jl-1—FOUR-SPEED
TRANSMISSION

1—
Control
Housing Gasket
2—
Control
Housing Assembly
3— Mainshaft Assembly
4—
Thrust
Washer
5—
Thrust
Washer
6— Reverse Shifting
Shoe
7— Reverse Shifting Arm
8—
C-Washer

9— Reverse Shifting Arm Pivot
10—
O-Ring

11— Reverse Idler
Gear
Assembly
12— Snap Ring
13—
Thrust
Washer
14—
Sleeve

15— Bearing Rollers
16— Spacer
17— Reverse Idler
Gear

18— Pipe Plug
19— Countershaft Gears 20— Bearing Rollers
21— Spacer 22— Spacer
23—
Thrust
Washer

2
4
—Bellhousi ng-to-Transmission Adapter Plate
25— Bearing Retainer
26— Bearing Retainer Bolt
27— Bearing Retainer Lockwasher
28— Bearing Retainer Gasket
29—
Main
Drive
Gear

30— Bearing Rollers 31— Transmission Case
32— Adapter Plate Lockwasher
33— Adapter Plate Capscrew
34— Side Opening Cover Gasket
35— Side Opening Cover Bolt
36— Side Opening Cover Lockwasher
37— Side Opening Cover 38— Countershaft
39— Shifting Arm Pivot Taper Pin
40— Bearing
41— Snap Ring
42—
Oil
Seal 43— Spacer
44— Reverse-Idler
Gear
Shaft 45—
Lock
Plate
46—
Lock
Plate Lockwasher
47—
Lock
Plate Bolt
48— Gasket
49— Adapter Plate 50— Adapter Plate Lockwasher
51— Adapter Plate Bolt
52— Cotter Key
53— Nut 54— Washer
55— Gasket 259

'Jeep*
UNIVERSAL
SERIES SERVICE
MANUAL

Jl

1—
Blocking
Rir

2—
Direct
and 1

3—
Snap
Ring

4—
Spring

5—
Shifting
Plat

6—
Direct
and 1 7—
Third
Speed
J1-3
4-Speed Transmission Disassembly

•
Refer to Fig. Jl-1.

Note;
The
models
T-98 and T-18 four-speed
transmission are similar in design with exception of
the second
speed
gear-to-mainshaft arrangement.
In
the model T-18 transmission, the second
speed

gear is a slide fit on the mainshaft, whereas in the
model T-98 transmission roller bearings and a
spacer are required in this area. Refer to Figs. Jl-3
and
Jl-4.

a.
Remove the transmission to transfer case adapter plate and gasket. Remove the oil seal from
the plate and, if damaged, discard the seal.
b. Remove the transmission control housing as­
sembly. Refer to paragraph Jl-4 for its dis­
assembly.
c. To make certain the two blocking rings, direct-

and-third
clutch hub, and direct-and-third clutch
sleeve
will
be assembled in their original relation­

ship,
mark them with a quick drying lacquer or an
electric pencil. Also mark the blocking ring, low-
and-second clutch hub, and the low-and-second
speed
gear.

d.
Slide the low-and-second
speed
gear toward the rear of the transmission case.
e.
Disengage
the reverse shifting arm and reverse shifting
shoe
from the reverse idler gear. Remove
the arm from the reverse shifting arm pivot.
f. Move the low-and-second
speed
gear
into
neutral position.
g. Remove the bearing retainer and gasket.
Remove the snap rings from the main drive gear
and
the outer race of the ball bearing.

h.
With a bearing puller, remove the main drive
gear ball bearing. 1436S
i
Hub

Gear

izer
Assembly

ironizer
Assembly
i.
Remove the oil slinger.

j.
Remove the snap ring from the outer bearing
race
of the transmission mainshaft ball bearing.
k. With a bearing puller, remove the mainshaft

ball
bearing.

Note:
It may be necessary to drive the mainshaft

rearward
by striking the end of the main drive gear with a lead hammer to get sufficient clearance
to install the bearing puller plates.

I.
Slide the direct-and-third clutch
sleeve
to the

rear
(third
speed)
position. Separate the mainshaft
assembly from the main drive gear. Be careful
not to
lose
any of the mainshaft pilot bearing
rollers.

m.
Lift
the mainshaft assembly out of the top
of the transmission case.

n.
Remove the main drive gear from the trans­
mission case.
o. Remove the mainshaft bearing rollers from the gear.
p.
Mark
relationship
between
synchronizer hubs

and
the splines on the mainshaft.
q. Begin disassembly of the main shaft assembly by removing the snap ring which holds the direct

and
third synchronizer assembly on the mainshaft,

r.
Remove the front blocking ring from the front
of the shaft.
s. Slide the direct-and-third-synchronizer assembly

and
the third-speed-gear assembly off the main-shaft.
t. Remove the snap ring at the rear of the main-
shaft. Slide the second synchronizer assembly and the blocking ring off the mainshaft.

FIG.
Jl-4—T-18
FOUR-SPEED TRANSMISSION MAINSHAFT ASSEMBLY
ng 8—Snap
Ring
15—Ball

third
Clutch
Sleeve
9—Thrust
Washer 16—Low and Second
Clutch
10—
Second
Speed
Gear
17—Retaining
Ring

11—
Mainshaft
18—Low and Second Speed
te 12—Blocking
Ring
19—Second Speed
Synchroni

rhird
Clutch
Hub 13—Shifting Plate 20—Direct and
Third
Synch

Gear
Assembly 14—Poppet
Spring
261

Jl

FOUR-SPEED
TRANSMISSION
U.
On the T-98 transmission remove the snap rings
holding the thrust washer, bearing rollers, second-

speed
gear, and spacer on the mainshaft. Slide
these
components
off the shaft. Refer to Fig. Jl-3.

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.
v. If the synchronizer assemblies are to be dis­
assembled and serviced proceed as follows:
Wrap

the
second-speed
synchronizer assembly in a cloth
to prevent losing the lock balls and springs. Push the clutch hub out of the low-and-second-speed
gear in a direction
opposite
the shift fork
groove.
Remove the cloth.
Lift
the balls, springs, and
plates out of the hub.
w. Remove the lockplate for the countershaft and
reverse idler gear shaft.

x.
Use a pry bar in the
slot
of the reverse idler gear
shaft to
loosen
the shaft.
Then,
slip the reverse

idler
gear shaft out of the housing and gear.
Lift
the reverse idler gear assembly from the transmission case.
y. To remove the countershaft, use a heavy brass
drift
and drive the countershaft toward the
rear
of
the transmission case. When the countershaft end
is just about even with the inside of the trans­ mission case, use a dummy shaft to force it the
remainder of the way. (Since a dummy shaft is a
FIG.
Jl -5—FOUR-SPEED TRANSMISSION CONTROL PARTS

1—
Shift
Lever

2—
Control
Housing Pin

3—
Shift
Handle
4—
Control
Housing Cap 5—
Washer

6—
Control
Lever
Spring
7—
Breather
Assembly
8— Reverse Shift
Rail

9—
Shift
Rail
Interlock Plunger

10—Expansion
Plug 11—
Low
and Second Shift
Rail

12—
Shift
Rail
Interlock Pin
13—
Direct
and
Third
Shift
Rail

14—
Control
Housing
15—
Shift
Rail
Poppet Spring
16—
Shift
Rail
Poppet
Ball

17—
Lockwire
18—
Low
and Second Shift
Fork
19—
Lock
Pin
20—
Shift
Rail
End 21—
Direct
and
Third
Shift
Fork

22— Reverse Plunger
23— Reverse Plunger Spring
24— Reverse
Rail
End
25—
Cotter
Pin
26— Reverse Plunger Poppet Spring
27— Reverse Plunger Poppet
Ball
28—
C-Washer
262

'Jeep*
UNIVERSAL
SERIES
SERVICE
MANUAL

Jl
necessity for assembly, one should be made at this
time to assist on disassembly. One can be made by
using a \Y%N [2,86 cm.] diameter steel rod cut to

9.850*
{25,02
cm.] long.
Break
sharp
edges
with a
mill
file.) Keep the dummy shaft in contact with
the countershaft at all times to prevent dropping
the bearing rollers or thrust washers,

z.
With
the dummy shaft in position, place the
transmission
case on its side and carefully
roll
the countershaft gear cluster out of the case,

aa.
Complete the disassembly by removing the dummy shaft, thrust washers, four
sets
of bearing
rollers,
and spacers.

bb.
To disassemble the reverse idler gear assembly,
remove one of the snap rings and tap out the

washers,
both
sets
of bearing rollers, center spacer,
and
sleeve.
Remove the remaining snap
ring.

J1-4.
4-Speed
Transmission
Control
Housing
Disassembly

•
Refer to Fig. Jl-5.

The
gearshift lever, spring, and spring seat were previously removed for removal of the transmission

from
the vehicle.

a.
Remove the lock pins from the gearshift forks

and
gearshift rod ends. Remove the expansion plugs
from
the front and
rear
of the gearshift lever base. Remove back-up light switch.

b.
Remove the center (third and high) gearshift

rod
first. Drive this gearshift rod out the
rear

of the gearshift lever base. As the gearshift rod is
withdrawn
from the center section of the gearshift base, remove the interlock pin from the cross­
over
hole
in the gearshift rod. Before the gearshift
rod
is removed from the center section of the gear­
shift base, place a finger over the
hole
to prevent

loss
of the
ball
and spring.
Then
remove the rod.

c»
Remove the low- and second-speed gearshift rod
in
the same manner.

d.
Remove the gearshift rod lock balls and springs

and.
with a piece of
wire,
push the two gearshift rod
interlock
plungers out of the pockets in the center
section of the gearshift base.

In
the reverse gearshift rod end is a spring-loaded
plunger which prevents the
driver
from accidentally
shifting into reverse gear. Should this part require
servicing,
proceed as follows:
Remove the cotter key from the rod end assembly

and
at the same time hold a finger over the
hole

to prevent
loss
of the spring.
Then
shake out the
spring
and
ball.
Compress the plunger and spring

until
the C-washer
groove
just clears the end of
the casting. Remove the C-washer.

J1-5.
4-speed
Transmission Reassembly •
Refer to Fig. Jl-1.
Assemble the unit in the reverse order of dis­
assembly noting the following points:

a.
Assemble the countershaft assembly with the
fabricated
dummy shaft. The bronze front thrust

washer
and the steel backed bronze
rear
thrust
washer
should be coated with stiff lubricant and
installed
with the lugs
engaged
in the notches

in
the end of the gear cluster. Place the assembly
in
the transmission case and install the counter­
shaft from the
rear,
keeping the countershaft and
dummy shaft in contact to prevent dropping

bearing
rollers or washers. Tap the countershaft
lightly into position in the front of the case but
do not seat it until the reverse idler gear assembly

and
shaft have been installed in the case.

b.
Install
the reverse idler gear shaft in the case

until
the lock plate slot is adjacent to the slot in
the countershaft. Insert the lock plate in the
slots

of the shafts making sure the plate ends are square

with
the slots.
Install
the lock plate screw and
lockwasher
to act as a pilot while tapping the
shafts alternately into position in the case. Tighten
the lock plate screw securely.

c.
Begin assembly of the second speed synchronizer assembly (see
Fig.
Jl-6) by installing the low-and
-

second-speed clutch hub in the low-and-second-
speed gear.
Install
the retaining ring in the speed gear.
Install
the retaining ring in the low and
FIG.
Jl
-6—ASSEMBLING
SECOND-SPEED

SYNCHRONIZER
1—
Low
and Second
Clutch
Gear

2—
Ball

3—
Low
and Second
Clutch
Hub
4—
Shifting
Plate
second speed gear. Slide the hub out of the gear

in
the direction
opposite
the shift fork
groove

until
the
holes
in the hub are clear of the gear.
Install
the shifter plates and springs. Push the
hub back into the gear until the springs touch the

internal
teeth
of the gear. Push one of the shifter
plates toward the center of the gear while installing

ball.
See
Fig.
Jl-6 .
This
will
hold the
ball
in position.
Install
the other two balls in the same manner.

Be
careful when rotating the assembly to prevent the hub from slipping out of the gear. When the

balls
are installed, push the hub into the gear

until
the balls snap into the neutral position.

d.
Assemble the
direct
-
and
-
third
synchronizer as­
sembly in accordance with the instructions given

in
Section J, Par.
J-lle.

e.
Start
assembly of the mainshaft assembly by 263