1994 JEEP CHEROKEE tow

REAR CLUTCH OVERHAUL
REAR CLUTCH DISASSEMBLY
(1) Remove fiber thrust washer from forward side
of clutch retainer.
(2) Remove selective clutch pack snap ring (Figs.
65 and 66).
(3) Remove top pressure plate, clutch discs, steel
plates, bottom pressure plate and wave spring (Figs.
65 and 66).
(4) Remove clutch piston with rotating motion.
(5) Remove and discard piston seals.
(6) Remove input shaft snap ring (Fig. 67).
(7) Press input shaft out of retainer with shop
press and suitable size press tool (Fig. 68).
(8) Remove input shaft front/rear seal rings.
REAR CLUTCH INSPECTION
Clean the clutch components with solvent and dry
them with compressed air. Do not use rags or shop
towels to dry any of the clutch parts. Lint from such
materials will adhere to component surfaces and
could restrict or block fluid passages after assembly.
Replace the clutch discs if warped, worn, scored,
burned/charred, the lugs are damaged, or if the fac-
ing is flaking off. Replace the top and bottom pres-
sure plates if scored, warped, or cracked. Be sure the
driving lugs on the pressure and clutch plates arealso in good condition. The lugs must not be bent,
cracked or damaged in any way.
Fig. 64 Measuring Front Clutch Pack Clearance
Fig. 65 Rear Clutch Components (30RH)
21 - 128 30RH/32RH TRANSMISSION OVERHAULJ

seal ring is teflon with chamfered ends. The rear
ring is metal with interlocking ends.
Check the input shaft for wear, or damage. Replace
the shaft if worn, scored or damaged in any way.
ASSEMBLING REAR CLUTCH
(1) Soak clutch discs in transmission fluid while
assembling other clutch parts.
(2) Install new seal rings on clutch retainer hub
and input shaft if necessary (Fig. 69).
(a) Be sure clutch hub seal ring is fully seated in
groove and is not twisted.
(b) Note that input shaft front seal ring is teflon
and rear seal ring is metal (Fig. 70). Be sure cham-
fered ends of teflon ring are properly joined and
that ends of rear ring are securely hooked together.
Lubricate both rings with transmission fluid after
installation.
(3) Lubricate splined end of input shaft and clutch
retainer with transmission fluid. Then press input
shaft into retainer (Fig. 71).
(4) Install input shaft snap ring (Figs. 65-66).
(5) Install new seals on clutch piston. Be sure lip
of each seal faces interior of clutch retainer.
(6) Lubricate lip of piston seals with Ru-Glyde,
Door Eze, or petroleum jelly. Then lubricate retainer
hub and bore with transmission fluid.
(7) Install clutch piston in retainer. Use twisting
motion to seat piston in bottom of retainer.Do not
attempt to push the piston straight in. This
could fold the seals over causing leakage and
clutch slip.(8) Install piston spring in retainer and on top of
piston (Fig. 72). Concave side of spring faces down-
ward (toward piston).
(9) Install wave spring in retainer (Fig. 72). Be
sure spring is completely seated in retainer groove.
(10) Install bottom pressure plate (Fig. 65). Ridged
side of plate faces downward (toward piston) and flat
side toward clutch pack.
Fig. 69 Rear Clutch Retainer And Input Shaft Seal
Ring Installation
Fig. 70 Input Shaft Seal Ring Identification
Fig. 71 Pressing Input Shaft Into Rear Clutch
Retainer
21 - 130 30RH/32RH TRANSMISSION OVERHAULJ

REAR SERVO INSPECTION
Clean the servo components with solvent and dry
them with compressed air.
Check rear band condition. Replace the band if dis-
torted, the lining is burned or flaking off, or the lin-
ing is excessively worn.
On 30RH models, inspect the rear band link (Fig.
98). Replace the link if bent, or damaged. Check the
band reaction pin. Replace the O-rings if they are
cut, or torn. Minor pin scoring can be cleaned up
with crocus cloth. However, replace the pin if worn,
severely scored, or cracked.
Inspect the servo components (Fig. 99). Replace the
servo and cushion springs if collapsed, distorted or
broken. Replace the plug or piston if cracked, bent,or worn. Discard the servo snap ring and spring re-
tainer if distorted or warped.
If doubt exists about the condition of any servo
component, replace it. Do not reuse suspect parts.
ASSEMBLING REAR SERVO PISTON
(1) Assemble piston plug, cushion spring and pis-
ton (Fig. 99).
(2) Compress cushion spring in vise and install pis-
ton plug snap ring.
(3) Install new seal on piston. Be sure seal lip is
toward servo bore (Fig. 100).
(4) Lubricate piston seal with petroleum jelly. Lu-
bricate other servo parts with transmission fluid.
Fig. 96 Front Servo Components
Fig. 97 Removing/Installing Servo Piston Plug Snap
Ring
Fig. 98 Rear Band Components (30RH Shown)
Fig. 99 Rear Servo Components
J30RH/32RH TRANSMISSION OVERHAUL 21 - 137

(24) Remove 1-2 shift control valve and spring
from valve body (Fig. 113).
(25) Remove 2-3 shift valve and spring from valve
body (Fig. 113).
(26) Remove 1-2 shift valve and spring from valve
body (Fig. 113).
(27) Remove regulator valve end plate (Fig. 113).
(28) Remove regulator valve line pressure plug,
pressure plug sleeve, throttle pressure plug and
spring (Fig. 113).
VALVE BODY CLEANING AND INSPECTION
The only serviceable valve body components are:
²park lock rod and E-clip
²switch valve and spring
²pressure adjusting screw bracket
²throttle valve lever
²manual lever
²manual lever shaft seal, washer, E-clip and detent
ball
²fluid filter
²converter clutch solenoid
The remaining valve body components are serviced
only as part of a complete valve body assembly.
Clean the valve body components in a parts clean-
ing solution only. Do not use gasoline, kerosene, or
any type of caustic solution. Dry the parts with com-
pressed air. Make sure all passages are clean and
free from obstructions.
Do not use rags or shop towels to wipe off
valve body components. Lint from these materi-als will adhere to the valve body components.
Lint will interfere with valve operation and may
clog filters and fluid passages.
Inspect the throttle and manual valve levers and
shafts. Do not attempt to straighten a bent shaft or
correct a loose lever. Replace these components if
worn, bent, loose or damaged in any way.
Inspect all of the valve body mating surfaces for
scratches, nicks, burrs, or distortion. Use a straight-
edge to check surface flatness. Minor scratches may
be removed with crocus cloth using only very light
pressure.
Minor distortion of a valve body mating surface
may be corrected by smoothing the surface with cro-
cus cloth. The cloth should be in sheet form and be
positioned on a surface plate, sheet of plate glass, or
equally flat surface. However, if distortion is severe
or any surfaces are heavily scored, the valve body
will have to be replaced.
CAUTION: The throttle valve, shuttle valve plug, 1-2
shift valve and 1-2 governor plug are made of
coated aluminum. These components are identified
in Figure 114 with the abbreviation (Alum.). Alumi-
num components can be identified by the dark
color of the special coating applied to the surface
(or by testing with a magnet). DO NOT polish or
sand aluminum valves or plugs with any type of
material, or under any circumstances. This practice
might damage the special coating and cause the
valves and plugs to stick and bind.
Fig. 113 Shift Valves And Pressure Regulator Plugs
J30RH/32RH TRANSMISSION OVERHAUL 21 - 141

rect sequence. The correct sequence is line pressure
adjustment first and throttle pressure adjustment
last.
Line Pressure Adjustment
Measure distance from the valve body to the inner
edge of the adjusting screw with an accurate steel
scale (Fig. 119).
Distance should be 33.4 mm (1-5/16 in.).
If adjustment is required, turn the adjusting screw
in, or out, to obtain required distance setting.
The 33.4 mm (1-5/16 in.) setting is an approxi-
mate setting. Because of manufacturing toler-
ances, it may be necessary to vary from this
dimension to obtain desired pressure.
One complete turn of the adjusting screw changes
line pressure approximately 1-2/3 psi (9 kPa). Turn-
ing the adjusting screw counterclockwise increases
pressure while turning the screw clockwise decreases
pressure.
Throttle Pressure Adjustment
Insert Gauge Tool C-3763 between the throttle le-
ver cam and the kickdown valve stem (Fig. 120).
Push the gauge tool inward to compress the kick-
down valve against the spring and bottom the throt-
tle valve.
Maintain pressure against kickdown valve spring.
Turn throttle lever stop screw until the screw head
touches throttle lever tang and the throttle lever cam
touches gauge tool.
The kickdown valve spring must be fully com-
pressed and the kickdown valve completely
bottomed to obtain correct adjustment.
TRANSMISSION ASSEMBLY TIPS
Do not allow dirt, grease, or foreign material to en-
ter the case or transmission components during as-
sembly. Keep the transmission case and components
clean. Also make sure the tools and workbench area
used for assembly are equally clean.Shop towels used for wiping off your hands and ser-
vice tools must be made oflint freematerials. Lint
will adhere to transmission parts and could interfere
with valve operation, or even restrict fluid passages.
Lubricate the transmission components with ATF
Plus, or Dexron IIŸ during reassembly. Use petro-
leum jelly, Door Eze, or Ru-Glyde on seals and
O-rings to ease installation.
Petroleum jelly can also be used to hold thrust
washers and plates in position during assembly oper-
ations. However,do notuse chassis grease, bearing
grease, white grease, or similar lubricants on any
transmission part. These types of lubricants can
eventually block or restrict fluid passages and valve
operation. Use petroleum jelly only.
Do not force parts into place. Most of the transmis-
sion components are easily installed by hand when
properly aligned. If a part seems extremely difficult
to install, it is either misaligned or incorrectly as-
sembled. Also verify that thrust washers, thrust
plates and seal rings are correctly positioned before
assembly. These parts can interfere with proper as-
sembly if mispositioned or ``left out'' by accident.
TRANSMISSION ASSEMBLY AND ADJUSTMENT
PROCEDURES
SERVO INSTALLATION
(1) Install rear servo piston, spring and spring re-
tainer. Compress rear servo spring and retainer with
Compressor Tool C-3422-B or a large C-clamp.
(2) Install front servo piston, spring and rod guide.
Compress front servo rod guide with Valve Spring
Compressor C-3422-B and install servo snap ring.
OVERRUNNING CLUTCH INSTALLATION
(1) Examine bolt holes in overrunning clutch cam.
Note that one hole isnot threaded(Fig. 121). This
hole must align with blank area in clutch cam bolt
circle (Fig. 122).
Fig. 120 Throttle Pressure Adjustment
Fig. 119 Line Pressure Adjustment
21 - 146 30RH/32RH TRANSMISSION OVERHAULJ

(5) Coat output shaft thrust washer with petro-
leum jelly. Then install washer in rear clutch hub
(Fig. 144). Use enough petroleum jelly to hold
washer in place.Be sure grooved side of washer
faces rearward (toward output shaft) as shown.
Also note that washer only fits one way in
clutch hub.
(6) Align drive teeth on rear clutch discs with
small screwdriver (Fig. 145). This will make installa-
tion on front planetary easier.
(7) Raise front end of transmission upward as far
as possible and support case with wood blocks. Front/
rear clutch and oil pump assemblies are easier to in-
stall if transmission is as close to upright position as
possible.
(8) Install front and rear clutch units as assembly
(Fig. 146). Align rear clutch with front annulus gear
and install assembly in driving shell.Be sure out-
put shaft thrust washer and thrust plate are not
displaced during installation.
(9) Carefully work assembled clutches back and
forth to engage and seat rear clutch discs on frontannulus gear. Verify that front clutch drive lugs are
fully engaged in slots of driving shell after installa-
tion.
FRONT BAND AND OIL PUMP INSTALLATION
(1) Slide front band over front clutch retainer (Fig.
147).
(2) Insert front band reaction pin part way into
case (Fig. 147).
(3) Install front band lever, strut, lever pin and ad-
justing screw (Fig. 148).
(4) Tighten front band adjusting screw until band
just grips clutch retainer. Verify that front/rear
clutches are still seated before continuing.
(5) Coat band lever pin access plug with sealer and
install plug in converter housing (Fig. 149).
Fig. 144 Installing Output Shaft Thrust Washer
Fig. 145 Aligning Rear Clutch Disc Lugs
Fig. 146 Installing Front/Rear Clutch Assemblies
Fig. 147 Installing Front Band And Reaction Pin
21 - 152 30RH/32RH TRANSMISSION OVERHAULJ

(5) Disconnect throttle cable from throttle cam
(Fig. 13).
(6) Remove valve body bolts. Bolt locations are out-
lined in Figure 14.
(7) Lower valve body and remove overdrive clutch
accumulator springs, direct clutch accumulator
springs and second brake accumulator spring (Fig.
15)
(8) Remove valve body and check ball and spring
(Fig. 16).
TRANSMISSION VALVE BODY INSTALLATION
(1) Connect cable to throttle cam (Fig. 13).
(2) Install check ball and spring (Fig. 16).
(3) Position accumulator springs and spacers on
valve body.(4) Align valve body manual valve with shift sector
(Fig. 17) and carefully position valve body on case.
(5) Install valve body bolts (Fig. 14). Tighten bolts
evenly to 10 Nzm (7 ft. lbs.) torque.
(6) Install valve body oil tubes. Be sure tube ends
(L) and (M) are installed as shown in Figure 18.
(7) Remove old sealer material from oil pan and
transmission case.
(8) Clean oil screen and oil pan with solvent (if not
done previously). Dry both components with com-
pressed air only. Do not use shop towels.
(9) Install new gaskets on oil screen and install
screen on case. Tighten screen attaching bolts to 10
Nzm (7 ft. lbs.) torque.
Fig. 13 Removing/Installing Throttle Cable
Fig. 14 Transmission Valve Body Bolt Locations
Fig. 15 Accumulator Springs
Fig. 16 Removing/Installing Check Ball And Spring
JAW-4 IN-VEHICLE SERVICE 21 - 177

(2) Remove accumulator pistons with compressed
air (Fig. 27). Apply air through small feed hole next
to each piston bore. Catch each piston in a shop
towel as it exits bore.
CAUTION: Use only enough air pressure to ease
each piston out of the bore. In addition, remove the
pistons one at a time and tag the pistons and
springs for assembly reference. Do not intermix
them.
(3) Remove and discard piston O-ring seals. Then
clean pistons and springs with solvent.(4) Inspect pistons, springs and piston bores. Re-
place worn damaged pistons. Replace broken, col-
lapsed or distorted springs. Replace case if piston
bores are damaged.
(5) If small cushion spring in any piston must be
replaced, remove spring retainer clip and remove
spring from piston (Fig. 28). A small hooked tool or
small thin blade screwdriver can be used to remove
clip. A thin wall, deep socket, or pin punch can be
used to reseat clip after spring replacement.
(6) Install new O-ring seals on pistons. Lubricate
seals and pistons and piston bores with transmission
fluid.
(7) Install pistons and springs (Fig. 29).
(8) Install valve body, oil screen and oil pan. Use
Mopar or Loctite 599 on oil pan sealing surface.
Fig. 25 Installing Spacer Sleeve On Sector
Fig. 26 Installing Park Rod Bracket
Fig. 27 Accumulator Piston Removal
Fig. 28 Small Cushion Spring Retention
21 - 180 AW-4 IN-VEHICLE SERVICEJ