1994 JEEP CHEROKEE check transmission fluid

VALVE BODY INSTALLATION
(1) Place valve body manual lever in low (1 posi-
tion) so park lock rod can be installed in sprag.
(2) Position park sprag with screwdriver to ease
lock rod installation and engagement.
(3) Install new seals on accumulator piston if nec-
essary and install piston in case. A small amount of
petroleum jelly can be used to hold piston in place.
(4) Lubricate shaft of manual lever and lip of shaft
seal with petroleum jelly.
(5) Raise valve body and align park rod with case
opening and park sprag. Then push rod end through
opening and past sprag. Rotate propeller shaft if nec-
essary.
(6) Position accumulator spring on transfer plate.
(7) Align valve body and seat it on case. Be sure
manual lever shaft and accumulator spring are prop-
erly seated.
(8) Hold valve body in position and install one or
two attaching bolts to hold valve body in place.
(9) Install remaining valve body bolts. Tighten all
bolts evenly in a diagonal pattern to 12 Nzm (105 in-
lbs) torque.
(10) Install new oil filter and tighten filter screws
to4Nzm (35 in. lbs.) torque.
(11) Connect converter solenoid wire to case con-
nector.
(12) Install manual and throttle levers on throttle
lever shaft. Tighten lever clamp screws and check for
free operation. Shaft and levers must operate freely
without any bind.
(13) Install oil pan and new gasket. Tighten pan
bolts to 17 Nzm (13 ft. lbs.) torque.
(14) Install seal on neutral switch, install switch in
case, and connect switch wires.(15) Lower vehicle.
(16) Fill transmission with Mopar ATF Plus, Type
7176 fluid.
(17) Adjust gearshift linkage and throttle valve
(kickdown) cable if necessary.
GOVERNOR AND PARK GEAR SERVICE
GOVERNOR REMOVAL
(1) Raise vehicle.
(2) Mark both propeller shaft yokes for assembly
reference and disconnect propeller shafts at transfer
case.
(3) Disconnect speedometer cable.
(4) Position support stand under transmission con-
verter housing.
(5) Remove rear crossmember.
(6) Disconnect parking brake cable at equalizer
and disconnect exhaust pipe support brackets, if nec-
essary.
(7) Support transfer case with jack.
(8) Remove bolts attaching transfer case to trans-
mission adapter housing and remove transfer case.
(9) Remove bolts attaching adapter, or extension
housing to transmission and remove housing.
(10) Rotate transmission output shaft until gover-
nor valve shaft E-clip faces downward (Fig. 12).
(11) Remove E-clip from one end of governor valve
shaft (Fig. 12).
(12) Remove governor valve and shaft from gover-
nor body.
(13) Remove snap ring that retains governor body-
park gear assembly on output shaft (Fig. 12).
(14) Remove governor body-park gear assembly
from output shaft.
Fig. 12 Governor E-clips And Attaching Bolts
Fig. 11 Valve Body Assembly
J30RH/32RH IN-VEHICLE SERVICE 21 - 101

GOVERNOR DISASSEMBLY
(1) Remove governor weights and spring from body
(Fig. 13).
(2) Remove snap ring and separate inner weight
and outer weight and spring (Fig 13).
(3) Remove bolts attaching governor to park gear
(Fig. 13).
(4) Remove park gear from governor body.
(5) Remove filter screen from park gear or gover-
nor body (Fig. 13).
CLEANING AND INSPECTION
Thoroughly clean all the governor parts in a suit-
able cleaning solution but do not use any type of
caustic cleaning agents.
The weights and valves should fall freely in their
bores when clean and dry. Minor surface scratches
and burrs can be removed with crocus cloth.
Inspect the governor weight spring for distortion.
Replace the spring, if damaged. Clean the filter in
solvent and dry it with compressed air. Replace the
filter, if damaged. Inspect the park gear for chipped
or worn gear teeth or damaged ring grooves. Replace
the gear, if damaged.
GOVERNOR ASSEMBLY
The governor valve used in 30RH/31RH/32RH
transmissions built since the 1992 model year, is
made of aluminum. In addition, the output shaft
has been spotfaced to accept the new aluminum
valve. The aluminum valve must not be used in
previous transmissions. The valve can only be
used with an output shaft that has been spot-
faced for valve end clearance. In addition, thegovernor body and output shaft must be prop-
erly indexed during reassembly. Be sure to in-
dex these components as described in the
Transmission Assembly and Adjustment proce-
dures.
(1) Install filter screen in park gear.
(2) Assemble governor body and park gear. Be sure
oil passages in body and gear are aligned.
(3) Install governor-to-park gear bolts finger tight
only at this time.
(4) Install governor weight snap ring in governor
body. Then install governor weight and spring assem-
bly in governor body.
GOVERNOR INSTALLATION
(1) Align and install park gear/governor assembly
on output shaft.
(2) Align valve shaft bore in governor body with
bore in output shaft.Be sure hole in output shaft
for governor valve shaft is aligned with gover-
nor valve bore in governor body. Valve shaft
will bind if misalignment occurs. Remove and
reposition governor body if necessary.
(3) Install governor valve and shaft. Be sure shaft
slides freely in bore before installing E-clip on shaft.
(4) Install governor valve on shaft and in governor
body. Then install remaining shaft retaining snap
ring.
(5) Install components that retain governor body
and park gear on output shaft as follows:
(a) On models with single snap ring, install snap
ring (Fig. 12). Be sure ring is seated in shaft.
(b) On models with thrust washer and two snap
rings, install thin snap ring first. Then install
thrust washer second and thick snap ring last (Fig.
12).
16(c) Verify correct position of snap rings.Be
sure flat side of each snap ring is toward gov-
ernor body.
(6) Tighten governor-to-park gear bolts to 11 Nzm
(95 in. lbs.).
(7) Install adapter and gasket on transmission.
Tighten adapter bolts to 32 Nzm (24 ft. lbs.).
(8) Install transfer case and rear crossmember.
(9) Connect speedometer cable, or vehicle speed
sensor wires exhaust pipe brackets and brake cable,
if removed.
(10) Align and connect propeller shafts. Tighten
clamp bolts to 19 Nzm (14 ft. lbs.) torque.
(11) Remove supports and lower vehicle.
(12) Check and adjust transmission fluid level.
PARK LOCK COMPONENT REPLACEMENT
COMPONENT REMOVAL
(1) Raise vehicle and remove transfer case and
adapter housing from transmission.
Fig. 13 Governor Components
21 - 102 30RH/32RH IN-VEHICLE SERVICEJ

(2) Slide sprag shaft out of adapter housing and re-
move park sprag and spring (Fig. 14).
(3) Remove snap ring and slide plug and pin as-
sembly out of housing (Fig. 14).
(4) If park rod must be serviced, remove valve
body and remove rod.
Inspection
Check the sprag shaft for scores and for free move-
ment in the housing and sprag.
Check the sprag and control rod springs for loss of
tension or distortion. Check the square lug on the
sprag for broken edges. Check the lugs on the gover-
nor support (park gear) for broken edges.
Check the knob on the end of the control rod for
nicks, burrs and free turning.
Replace any park lock components that are worn or
damaged.
The park lock rods used in Chrysler 3-speed trans-
missions are different lengths. If the rod must be re-
placed, be sure to install the correct length and
shape rod.
COMPONENT INSTALLATION
(1) Install park lock rod on valve body.
(2) Install reaction plug and pin assembly in the
housing and install the snap ring.
(3) Position sprag and spring in housing and in-
stall sprag shaft. Be sure square lug on sprag is fac-
ing park gear and that spring is positioned so it
moves sprag away from park gear.
(4) Install valve body.
(5) Install adapter housing and transfer case.
PARK/NEUTRAL POSITION SWITCH SERVICE
The starter feed circuit of the switch is through the
switch center terminal (Fig. 15). It provides a ground
for the starter solenoid circuit through the gearshift
lever in park and neutral only.
The two outer terminals of the park/neutral posi-
tion switch are for the backup lamp switch circuit.
SWITCH TEST PROCEDURE
(1) Remove wiring connector from switch.
(2) Test continuity between switch center terminal
and transmission case. Continuity should exist only
when transmission is in Park or Neutral. Replace
switch if continuity occurs in any gear other than
Park or Neutral.
(3) Shift into reverse and test continuity between
two outside terminals on switch. Continuity should
exist only when transmission is in reverse.
(4) Leave transmission in reverse and test continu-
ity between each switch outer terminal and transmis-
sion case. Continuity should not exist between either
pin and case in reverse.
(5) If switch tests OK, check gearshift linkage ad-
justment or backup light circuit. Replace switch if it
fails continuity tests.
SWITCH REPLACEMENT
(1) Position drain pan under neutral switch.
(2) Disconnect switch wires.
(3) Remove switch from transmission.
(4) Move shift lever to Park and Neutral positions.
Inspect manual lever fingers, lever and shaft for
proper alignment with switch opening in case. Re-
place lever if worn or bent. Do not attempt to
straighten the lever.
(5) Install new switch and seal in case. Tighten
switch to 33 Nzm (24 ft. lbs.) torque.
(6) Adjust transmission fluid level as required.
(7) Verify switch operation.
SPEEDOMETER SERVICE
Rear axle gear ratio and tire size determine speedom-
eter pinion requirements. If the pinion must be re-
placed, refer to the parts catalogue information for the
correct part. It is important for speedometer accuracy
that the pinion have the correct number of teeth.
Fig. 14 Park Lock Components
Fig. 15 Park/Neutral Position Switch And Manual
Lever
J30RH/32RH IN-VEHICLE SERVICE 21 - 103

(10) Install speedometer adapter clamp and retain-
ing screw. Tighten clamp screw to 10-12 Nzm (90-110
in. lbs.) torque.
(11) Connect wires to vehicle speed sensor.
(12) Lower vehicle and top off transmission fluid
level if necessary.
SPEEDOMETER COMPONENT REMOVAL
(TWO-PIECE SENSOR)
(1) Raise vehicle.
(2) Disconnect speed sensor wires.
(3) Remove bolt attaching vehicle speed sensor to
sensor adapter. Then slide sensor out of adapter.
(4) Inspect speed sensor mounting area in sensor
adapter. If transmission fluid is found in this area,
oil seal in metal speedometer adapter is leaking and
will have to be replaced.
(5) Remove speedometer adapter clamp bolt and
remove clamp (Fig. 18).
(6) Remove speedometer adapter, sensor adapter
and speedometer pinion as assembly.
SPEEDOMETER COMPONENT INSTALLATION
AND INDEXING (TWO-PIECE SENSOR)
(1) Replace speedometer O-ring if cut, torn, or worn.
(2) If oil seal in metal speedometer adapter needs
replacement, remove old seal with pointed tool. Then
install new seal with Special Tool C-4004. Push seal
into place with tool until tool bottoms (Fig. 19).
(3) Clean speedometer adapter mounting surface of
transmission, or transfer case thoroughly.
(4) Lubricate adapter seals with transmission fluid.
(5) Count number of teeth on speedometer pinion.
Do this before installing pinion and adapter.
(6) Note range numbers on face of speedometer
adapter (Fig. 20). These numbers correspond to num-
ber of teeth on speedometer pinion.
(7) Install pinion in adapter and install assembled
pinion and adapter in transmission or transfer case.
(8) Rotate speedometer adapter until required
range numbers are at 6 o'clock position (Fig. 20).
Verify that range numbers correspond to num-
ber of teeth on pinion.
(9) Push speedometer adapter into place until seated.
(10) Install speedometer adapter clamp and bolt.
Tighten bolt to 11 Nzm (100 in. lbs.) torque.
(11) Install sensor adapter on speedometer adapter
(Fig. 18). Tighten sensor adapter coupling nut to 17
Nzm (150 in. lbs.) torque.
(12) Carefully align and insert vehicle speed sensor
into sensor adapter.
(13) Install bolt that attaches speed sensor to
adapter. Tighten bolt to 5-8 Nzm (48-72 in. lbs.)
(14) Connect wires to speed sensor.
(15) Lower vehicle.
(16) Check top off transmission fluid level if necessary.
TRANSMISSION COOLER REVERSE FLUSHING
The transmission main cooler is located in the ra-
diator lower tank. The cooler is not a serviceable
component. If the cooler is damaged in any way, the
radiator will have to be replaced.
On models with an auxiliary cooler, the cooler is
mounted in front of the radiator or air conditioningFig. 18 Speedometer Components (With Two-Piece
Sensor)
Fig. 19 Installing Speedometer Adapter Seal (With
Two-Piece Sensor And Metal Adapter)
Fig. 20 Indexing Speedometer Adapter (With Two-
Piece Sensor)
J30RH/32RH IN-VEHICLE SERVICE 21 - 105

condenser. The auxiliary cooler is a serviceable com-
ponent and can be repaired if necessary.
The main and auxiliary coolers should be thor-
oughly reverse flushed if a transmission failure
contaminates the fluid. Reverse flushing the cooler
and lines will prevent sludge and particles from
flowing back into the transmission after repair.
The same flushing procedure is used for main and
auxiliary coolers. Pressure equipment is preferred for
reverse flushing. However, reverse flushing can be
performed using hand operated equipment as de-
scribed in the following procedure.
REVERSE FLUSHING PROCEDURE
(1) Disconnect cooler lines at transmission. Refer
to Figure 21 for cooler line fitting identification.
Front fitting is outlet to cooler and rear fitting is in-
let from cooler.
(2) Position drain pan under cooler outlet line to
material flushed through cooler and lines.
(3) Reverse flush cooler using hand operated suc-
tion gun filled with mineral spirits. Insert gun nozzle
(or hose) into cooler inlet (return) line. Then force
mineral spirits through Line and cooler.
(4) Continue reverse flushing until fluid exiting in-
let (pressure) line is clear and free of debris/residue.
Replace radiator if fluid cannot be pumped
through cooler.
(5) Clear flushing materials from cooler and lines
with short pulses of compressed air. Insert air gun
nozzle into cooler inlet (return) line and continue
short pulses of air until all fluid is cleared from
cooler and lines.
(6) Pump one quart of fresh automatic transmis-
sion fluid through cooler and lines before reconnect-
ing cooler lines.
TRANSMISSION COOLER FLOW TESTING
The transmission main and auxiliary coolers
should be flow tested whenever a fluid overheat con-
dition is suspected. An overheat condition is indi-
cated when the fluid changes from the normal red, to
a dark orange, or brown color.
The same method of flow testing is used for both
coolers.Cooler flow is checked by measuring the amount of
fluid flow through the cooler in a 20 second time pe-
riod. The test is performed with the engine running
and transmission in neutral. Fluid is then pumped
through the cooler by the transmission oil pump.
(1) Disconnect cooler inlet line at transmission fitting.
(2) Securely attach hose to end of inlet line and po-
sition line in a one quart test container.
(3) Add extra quart of fluid to transmission.
(4) Use stopwatch to check flow test time.
(5) Shift transmission into neutral and set parking
brake.
(6) Start and run engine at curb idle speed and im-
mediately note cooler flow. Approximately one quart of
fluid should flow into test container in 20 second period.
(7) If cooler flow is intermittent, flows less than
one quart in 20 seconds, or does not flow at all,
cooler is faulty and must be replaced.
SERVICING TRANSMISSION COOLER LINES AND
FITTINGS
Fitting Types
The transmission cooler lines are attached with
quick disconnect fittings.
A flange on the cooler line serves as the sealing
mechanism. The wire retainer clip (Fig. 22), secures
the cooler line in the fitting by this flange. The clip
fits behind the flange to hold the line in place.
Three different fitting styles may be used. Type 1
fittings have the retainer clip exposed (Fig. 22). Type
2 fittings have the retainer clip and fitting body en-
cased in a shrink wrap material (Fig. 23). Type 3 fit-
tings have the retainer clip encased in a metal sleeve
crimped onto the fitting body (Fig. 24).
Fitting Release Tool
A release tool isrequiredto disconnect each of the
fitting types. A plastic tool is clipped directly to one
of the cooler lines on models with the type 2 and 3
fittings. This tool can also be used to disconnect type
1 fittings. The tool is needed to spread the wire re-
tainer clip in each fitting. The clip must be opened in
order to release the cooler line from the fitting.
Fig. 21 Identifying Transmission Cooler Lines
Fig. 22 Type 1 Quick Disconnect Fitting
21 - 106 30RH/32RH IN-VEHICLE SERVICEJ

(1) Lubricate converter drive hub and pump seal
with Mopar ATF Plus, or Dexron II transmission
fluid. Then install converter. Turn converter back
and forth to align drive slots in converter hub with
pump gear lugs. Be sure converter is fully seated in
pump (Fig. 5).
(2) Temporarily secure converter with C-clamp or
metal strap attached across converter housing.
(3) Position transmission on jack and secure it
with safety chains.
(4) Raise transmission and align converter with
drive plate.
(5) Move transmission forward. Then raise, lower
or tilt transmission to align converter housing with
engine block dowels.
(6) Install two converter housing lower attaching
bolts and tighten bolts to draw housing toward en-
gine.
(7) Install and tighten converter attaching bolts.
(8) Install and tighten bolts that attach transmis-
sion to engine (Fig. 6).
(9) Install crankshaft position sensor as follows:
CAUTION: Clearance between the sensor pickup
face and driveplate ring gear must be correctly es-
tablished before engine startup. A cardboard
spacer, attached to the sensor face, is used for thispurpose. Failure to establish correct clearance will
result in sensor breakage.
(a) Remove any remaining fragments of original
cardboard spacer from sensor pickup face.
Fig. 5 Checking Torque Converter Seating
Fig. 6 Transmission Attachment
21 - 110 30RH/32RH TRANSMISSION REMOVAL AND INSTALLATIONJ

(b) Align and install new spacer on sensor
pickup face. Spacer has adhesive backing so it will
adhere to sensor face.
(c) Insert sensor into housing until it just
touches ring gear teeth. Then install and tighten
sensor attaching bolt. Correct clearance is estab-
lished when spacer is peeled off by ring gear dur-
ing engine startup.
(10) Install transmission fill tube and O-ring (Fig.
6).
(11) Connect transmission cooler lines to fittings.
Refer to Figure 7 for cooler line identification.(12) Position support stand under transmission
and remove transmission jack.
(13) Install transfer case on transmission adapter.
Tighten attaching nuts to 41 Nzm (30 ft. lbs.) torque.
(14) Install rear crossmember and attach transmis-
sion rear support to crossmember.
(15) Connect vehicle speed sensor wires.
(16) Install inspection cover on converter housing.
(17) Install exhaust pipes and support brackets, if
removed.
(18) Install starter motor.
(19) Connect wires to park/neutral position switch.
(20) Connect gearshift and linkage and throttle ca-
ble.
(21) Connect transfer case shift linkage.
(22) Connect propeller shafts to transfer case
yokes.
(23) Connect front exhaust pipes and catalytic con-
verter support bracket bolts (if removed).
(24) Install skid plate, rear cushion and bracket, if
removed.
(25) Fill transfer case to bottom edge of fill plug
hole with Mopar Dexron II.
(26) Lower vehicle and fill transmission to correct
level with ATF Plus, type 7176 fluid.
(27) Install fan shroud and bolts (if removed).
(28) Check and adjust gearshift linkage if neces-
sary. Then check and adjust throttle cable if neces-
sary.
Fig. 7 Transmission Cooler Line Location And
Identification
J30RH/32RH TRANSMISSION REMOVAL AND INSTALLATION 21 - 111

GOVERNOR AND PARK GEAR OVERHAUL
GOVERNOR/PARK GEAR DISASSEMBLY
(1) Loosen bolts attaching governor to park gear.
(2) Remove governor snap ring and locating snap
ring from output shaft (Fig. 39).
(3) Remove E-clip securing governor valve shaft
and remove shaft and valve from governor body.
(4) Slide governor and park gear off output shaft.
(5) Remove governor retaining bolts and separate
governor from park gear.
(6) Remove governor filter from park gear. Keep
filter with governor body.
(7) Remove governor weight snap ring and remove
weight assembly from governor body. Remove inner
snap ring and separate governor weights.
GOVERNOR/PARK GEAR CLEANING AND
INSPECTION
Clean the governor and park gear components in
solvent and dry with compressed air.
Examine the governor components carefully (Fig.
39). Discard any snap rings or E-clips if distorted, or
worn. Be sure the governor weights operate freely in
the bores and do not bind. Also verify that the gov-
ernor valve slides freely on the shaft and in the bore.
Minor scratches, or burrs on governor components
can be cleaned up with oil-soaked crocus cloth. How-
ever, do not attempt to salvage components that are
severely worn or scored.
The governor valve used in 30RH/32RH trans-
missions built starting with the 1992 model year,
is now made of aluminum. In addition, the out-
put shaft has been spotfaced to accept the newaluminum valve (Fig. 39). The aluminum valve
must not be used in prior transmissions. The
valve can only be used with an output shaft that
has been spotfaced for valve end clearance. In
addition, the governor body and output shaft
must be properly indexed during reassembly. Be
sure to index these components as described in
the Transmission Assembly and Adjustment pro-
cedures.
Check condition of the park gear seal rings, ring
grooves and gear teeth (Fig. 40). Replace the gear as
an assembly if the teeth or ring grooves are worn, or
damaged.
Replace the park gear front and rear seal rings if
cracked, or worn. The production style front ring is a
plain type and the rear ring is a hook style. If re-
placement rings are both hook-style, be sure the ring
ends are properly hooked together.ASSEMBLING GOVERNOR AND PARK GEAR
(1) Coat governor body bores and valves with
transmission fluid.
(2) Assemble governor weights and springs. Then
install weight assembly in governor body but do not
install valve and shaft at this time. These parts are
not installed until after governor and park gear are
in place on output shaft.
(3) Install new seal rings on park gear if neces-
sary.
(4) Insert filter screen in park gear and position
governor body on park gear.
Fig. 38 Correct Position Of Sprag And Spring
Fig. 39 Governor Components
J30RH/32RH TRANSMISSION OVERHAUL 21 - 121