1994 JEEP CHEROKEE Service Repair Manual

(8) Remove support seal rings (Fig. 6).
(9) Measure free length of piston return springs
with springs mounted in retainer (Fig. 7). Length
should be 17.23 mm (0.678 in.).
(10) Clean support components and dry them with
compressed air.
(11) Inspect overdrive support and brake piston. Re-
place support and piston if either part is worn or dam-
aged.
ASSEMBLING OVERDRIVE SUPPORT
(1) Lubricate new support seal rings. Then com-
press rings and install them on support (Fig. 8).
(2) Lubricate and install new O-rings on brake pis-
ton. Then carefully seat piston in support.(3) Install return springs on brake piston.
(4) Compress return springs with Spring Compres-
sor 7537 (Fig. 5) and install piston snap ring.
(5) Install support bearing race and clutch drum
thrust washer (Fig. 4).
(6) Install thrust bearing and front and rear bear-
ing races. Thrust bearing rollers should face upward
as shown (Fig. 9).
(7) Verify thrust bearing/race sizes (Fig. 9).
²Front race outer diameter is 47.8 mm (1.882 in.)
and inside diameter is 30.7 mm (1.209 in.).
Fig. 9 Installing Support Thrust Bearing And Races
Fig. 6 Removing Support Seal Rings
Fig. 7 Checking Piston Return Spring Length
Fig. 8 Installing Support Seal Rings
21 - 218 AW-4 TRANSMISSION OVERHAULJ

²Rear race outer diameter is 47.8 mm (1.882 in.)
and inside diameter is 34.3 mm (1.350 in.).
²Bearing outer diameter is 47.7 mm (1.878 in.) and
inside diameter is 32.7 mm (1.287 in.).
(8) Verify brake piston operation. Use same proce-
dure described at beginning of disassembly. Piston
should operate smoothly and not bind or stick.
DIRECT CLUTCH OVERHAUL
CLUTCH DISASSEMBLY
(1) Remove direct clutch from forward clutch (Fig.
1).
(2) Remove clutch drum thrust washer (Fig. 2).(3) Check clutch piston stroke length as outlined in
following steps.
(4) Mount direct clutch on overdrive support as-
sembly (Fig. 3).
(5) Mount dial indicator on clutch and position in-
dicator plunger on clutch piston (Fig. 4).
(6) Apply 57-114 psi air pressure through feed hole
in overdrive support and note piston stroke length
(Fig. 4). Check stroke at least twice.
Fig. 1 Separate Direct Clutch From Forward Clutch
Fig. 2 Removing Clutch Drum Thrust Washer
Fig. 3 Mount Direct Clutch On Overdrive Support
Fig. 4 Checking Direct Clutch Piston Stroke Length
JAW-4 TRANSMISSION OVERHAUL 21 - 219

(7) Piston stroke length should be 1.37 mm - 1.67
mm (0.054 -0.065 in.). If stroke length is incorrect, ei-
ther the clutch pack retainer or clutch discs will have
to be replaced.
(8) Remove clutch pack snap ring and remove re-
tainer and clutch pack from drum (Fig. 5).
(9) Compress clutch piston return springs with tool
7538 and remove clutch piston snap ring (Fig. 6).
(10) Remove compressor tool and return spring.(11) Remove clutch piston. Remount clutch on
overdrive support (Fig. 7). Apply compressed air
through piston feed hole in support to remove piston.
Use only enough air to ease piston out.
(12) Remove and discard clutch piston O-rings.
(13) Measure clutch disc thickness. Minimum al-
lowable thickness is 1.84 mm (0.0724 in). Replace
discs if below minimum thickness.
(14) Measure free length of piston return springs
with springs in retainer (Fig. 8). Length should be
21.32 mm (0.839 in.). Replace return springs if not
within specification.
Fig. 5 Removing Clutch Pack Snap Ring
Fig. 6 Removing Piston Return Spring
Fig. 7 Removing Direct Clutch Piston
Fig. 8 Checking Piston Return Spring Length
21 - 220 AW-4 TRANSMISSION OVERHAULJ

(15) Check clutch piston check ball (Fig. 9). Shake
piston to see if ball moves freely. Then check ball
seating by applying low pressure compressed air to
ball inlet as shown. Air should not leak past check
ball.
(16) Measure inside diameter of clutch drum bush-
ing. Inside diameter should be no more than 53.97
mm (2.1248 in.). Replace drum if bushing inside di-
ameter is greater than specified.
DIRECT CLUTCH ASSEMBLY
(1) Lubricate and install replacement O-rings on
clutch piston (Fig. 10).
(2) Install clutch piston in drum and install return
springs on piston.
(3) Compress piston return springs with Tool 7538
and install snap ring (Fig. 6). Be sure snap ring end
gap is not aligned with spring retainer tab.
(4) Install clutch discs and plates (Fig. 11). Install
plate then disc until all plates and discs are in-
stalled. Four plates and discs are required.
(5) Install clutch pack retainer in drum (Fig. 12).
(6) Install clutch pack snap ring (Fig. 12).(7) Check snap ring position. If necessary, shift
snap ring until end gap isnotaligned with any
notches in clutch drum (Fig. 12).
Fig. 10 Direct Clutch Components
Fig. 9 Testing Piston Check Ball Seating
JAW-4 TRANSMISSION OVERHAUL 21 - 221

(8) Check clutch piston stroke length a second
time. If length is OK, continue with assembly. If
stroke length is incorrect, replace clutch discs or use
different thickness clutch pack retainer (Fig. 12). See
Specifications section for retainer thicknesses.
(9) Lubricate clutch drum thrust washer with pe-
troleum jelly and install it in drum (Fig. 3).
(10) Mount direct clutch assembly on forward
clutch assembly and check assembled height (Fig.
14). Height should be 70.3 to 71.5 mm (2.767 to 2.815
in.).
(11) If assembled height is incorrect, clutches are
not seated.(12) If clutch height is OK, remove direct clutch
from forward clutch and proceed to forward clutch
overhaul.
Fig. 11 Installing Direct Clutch Discs And Plates
Fig. 12 Install Clutch Pack Retainer
Fig. 13 Adjusting Clutch Pack Snap Ring Position
Fig. 14 Checking Direct Clutch Assembled Height
21 - 222 AW-4 TRANSMISSION OVERHAULJ

FORWARD CLUTCH OVERHAUL
FORWARD CLUTCH DISASSEMBLY (FIG. 1)
(1) Check clutch piston stroke as outlined in fol-
lowing steps.
(2) Position overdrive support on wood blocks and
mount forward clutch drum on support (Fig. 2).
(3) Remove bearing and race from forward clutch
drum (Fig. 2).
(4) Mount dial indicator on clutch drum. Position
dial indicator plunger against clutch piston (Fig. 3).(5) Apply compressed air through right side feed
hole in support and note piston stroke length on dial
indicator.
(6) Stroke length should be 3.55 - 3.73 mm (0.1348
- 0.1469 in.).
(7) Replace clutch discs if stroke length is incor-
rect.
Fig. 1 Forward Clutch Components
JAW-4 TRANSMISSION OVERHAUL 21 - 223

(8) Remove clutch pack snap ring and remove re-
tainer and clutch pack (Fig. 4).
(9) Remove clutch pack cushion plate (Fig. 5).
(10) Compress clutch springs with Tool 7538 and
remove piston snap ring.
(11) Remove spring compressor tool and piston re-
turn springs.
Fig. 2 Positioning Drum And Support On Wood
Blocks
Fig. 3 Checking Forward Clutch Piston Stroke
Length
Fig. 4 Removing Retainer And Clutch Pack
Fig. 5 Removing Cushion Plate
21 - 224 AW-4 TRANSMISSION OVERHAULJ

(12) Remount forward clutch drum on overdrive
support (Fig. 6).
(13) Apply compressed air through feed hole in
support to remove piston (Fig. 6). Use only enough
air pressure to ease piston out of drum.
(14) Remove and discard clutch piston O-rings.
(15) Remove clutch drum O-ring from rear hub of
drum.(16) Remove three seal rings from clutch drum
shaft (Fig. 8).
(17) Remove thrust bearing and race assembly
from clutch drum (Fig. 9).
Fig. 6 Removing Forward Clutch Piston
Fig. 7 Removing/Installing Clutch Drum O-Ring
Fig. 8 Removing Clutch Drum Seal Rings
Fig. 9 Removing Clutch Drum Thrust Bearing
Assembly
JAW-4 TRANSMISSION OVERHAUL 21 - 225