1994 JEEP CHEROKEE oil filter

30RH/32RH IN-VEHICLE SERVICE
INDEX
page page
Checking Fluid Level and Condition........... 96
Front Band Adjustment.................... 99
Gearshift Linkage Adjustment (YJ)............ 96
Governor and Park Gear Service............ 101
Oil Filter Replacement.................... 100
Park Interlock Cable Adjustment (XJ)......... 97
Park Lock Component Replacement......... 102
Park/Neutral Position Switch Service......... 103
Rear Band Adjustment.................... 99
Recommended Fluid...................... 96
Servicing Transmission Cooler Lines and Fittings. 106
Shift Cable Adjustment (XJ)................ 97
Speedometer Service.................... 103
Transmission Cooler Flow Testing........... 106
Transmission Cooler Reverse Flushing....... 105
Transmission Throttle Cable Adjustment (XJ/YJ) . 98
Valve Body Installation................... 101
Valve Body Removal..................... 100
Valve Body Service...................... 100
RECOMMENDED FLUID
The recommended and preferred fluid for 30RH/
32RH transmissions is Mopar ATF Plus, Type 7176.
Mopar Dexron II is acceptable but should only be
used when ATF Plus is not available.
Transmission fluid capacity is approximately 17
pints (7.9 liters). This is the approximate amount of
fluid required to fill the transmission and torque con-
verter after overhaul.
CHECKING FLUID LEVEL AND CONDITION
(1) Position vehicle on flat, level surface. This is
important in obtaining an accurate fluid level check.
(2) To avoid false readings, which could produce
under or over fill condition, do not check level until
fluid is at normal operating temperature.
(3) Shift transmission into Neutral.
(4) Apply parking brakes.
(5) Operate engine at curb idle speed.
WARNING: WHEN PERFORMING UNDERHOOD OP-
ERATIONS WITH THE ENGINE RUNNING, KEEP
YOUR HANDS WELL AWAY FROM HOT OR ROTAT-
ING ENGINE COMPONENTS. DO NOT WEAR
LOOSE ARTICLES OF CLOTHING WHICH COULD
BECOME ENTANGLED IN ENGINE COMPONENTS
OR ACCESSORIES.
(6) Shift transmission through all gear ranges and
back to Neutral (leave engine running).
(7) Clean exterior of dipstick cap and fill tube be-
fore removing transmission dipstick.
(8) Remove dipstick and inspect fluid level.
²Correct level is to FULL mark
²Acceptable level is between ADD and FULL marks
(9) Check fluid condition. Fluid should be dark to
light red in color and free of dirt or debris.
(10) If fluid is discolored or smells burned but
transmission operation was OK, check cooler flow,
flush cooler and lines and change fluid and filter.
Then road test again to confirm proper operation.(11) If fluid is black or dark brown, burned/turned
to sludge, contains large quantities of metal or fric-
tion material particles, transmission will need over-
haul. Especially if problems were evident during
road test and preliminary diagnosis. Fluid cooler
should also be flow tested and flushed if necessary.
GEARSHIFT LINKAGE ADJUSTMENT (YJ)
(1) Check linkage adjustment by starting engine in
Park and Neutral.
(2) Adjustment is OK if engine starts only in park
and Neutral. Adjustment is incorrect if engine starts
in one but not both positions.
(3) If engine starts in any position other than Park
or Neutral, or if engine will not start at all, park/
neutral position switch may be faulty.
(4) Shift transmission into Park.
(5) Raise vehicle.
(6) Check condition of shift rods, bellcrank, bell-
crank brackets and linkage bushings/grommets (Fig.
1). Tighten, repair, replace worn, damaged parts. Do
not attempt adjustment if linkage components are
worn or damaged.
(7) Loosen shift rod trunnion lock bolt or nut. Be
sure upper shift rod slides freely in trunnion (Fig. 1).
Also be sure shift rods and bellcrank rotate freely
and do not bind at any point.
(8) Verify that manual lever is in Park detent
(Fig. 1). Move lever all the way rearward to be sure
it is in Park.
(9) Check for positive engagement of park lock by
attempting to rotate propeller shaft. Shaft will not
turn when park pawl is engaged.
(10) Adjust shift rod trunnion to a obtain free pin
fit in bellcrank arm and tighten trunnion lock bolt or
nut. Prevent shift rod from turning while tightening
bolt or nut. Gearshift linkage lash must be elimi-
nated to obtain proper adjustment. Eliminate lash by
pulling downward on shift rod and pressing upward
on bellcrank.
21 - 96 30RH/32RH IN-VEHICLE SERVICEJ

OIL FILTER REPLACEMENT
(1) Raise vehicle.
(2) Remove oil pan and drain fluid.
(3) Remove filter screws and remove oil filter (Fig.
9).
(4) Position new filter on valve body and install fil-
ter screws finger tight.
(5) Tighten filter screws to 4 Nzm (35 in. lbs.) with
inch pound torque wrench.
(6) Position new gasket on oil pan and install pan
on transmission. Tighten pan bolts to 17 Nzm (150 in.
lbs.) torque.
(7) Lower vehicle.
(8) Refill transmission with Mopar ATF Plus, Type
7176. Mopar Dexron II can be used if ATF Plus is not
readily available.
VALVE BODY REMOVAL
(1) Raise vehicle.
(2) Remove oil pan and drain fluid.
(3) Disconnect gearshift and throttle linkage at
transmission levers.
(4) Loosen clamp bolts and remove throttle and
manual valve levers from manual valve shaft.
(5) Disconnect park/neutral position switch wires
and remove switch and switch seal.
(6) Remove valve body oil filter.(7) Remove valve body attaching screws. Lower
valve body slightly and remove accumulator piston
and spring (Fig. 10). Rotate valve body down and
away from case. Pull it forward to disengage park
rod and remove valve body.
(8) Position valve body on bench or on repair stand
for disassembly, cleaning and inspection (Fig. 11).
VALVE BODY SERVICE
The valve body can be disassembled for cleaning
and inspection of the individual components. Valve
body service procedures are detailed in the overhaul
section.
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.
Fig. 9 Oil Filter Screw Locations
Fig. 10 Accumulator Piston And Spring
Fig. 8 Rear Band Lever And Adjusting Screw
Location
21 - 100 30RH/32RH IN-VEHICLE SERVICEJ

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

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

(2) Attach dial indicator to converter housing. Po-
sition indicator plunger against input shaft and zero
indicator.
(3) Move input shaft in and out and record read-
ing. End play should be 0.56 - 2.31 mm (0.022 - 0.091
in.).
(4) If end play is incorrect, transmission is incor-
rectly assembled, or output shaft thrust washer
and/or thrust plate are worn and need to be changed.
VALVE BODY INSTALLATION
(1) Install new manual lever shaft seal in case.
Use 15/16 deep well socket to install seal.
(2) Make sure neutral switch hasnotbeen in-
stalled in case. Remove switch if necessary as it will
interfere with valve body installation.
(3) Install new seal rings on accumulator piston
(Fig. 155). Lubricate accumulator piston, seals and
accumulator bore with transmission fluid.(4) Install accumulator piston and spring (Fig. 155)
in case.
(5) Place valve body manual lever in low to move
park lock rod rearward.
(6) Position valve body on case. Work park rod past
sprag and install valve body-to-case bolts finger
tight.
(7) Install park/neutral position switch in case.
Tighten switch to 34 Nzm (25 ft. lbs.) torque.
(8) Align valve body on case (Fig. 156).
(9) Install and tighten valve body-to-case bolts al-
ternately and evenly to 12 Nzm (105 in. lbs.) torque.
Start at center and work outward when tightening
bolts.Do not overtighten valve body bolts. This
could result in distortion and cross leakage af-
ter installation..
(10) Connect converter clutch solenoid wire to case
connector (Fig. 156).
(11) Install new filter on valve body (Fig. 157).
Tighten filter screws to 4 Nzm (35 in. lbs.).
BAND ADJUSTMENT AND OIL PAN
INSTALLATION
(1) Adjustfront bandas follows:
(a) Loosen locknut.
(b) Tighten adjusting screw to 72 in. lbs. torque.
Fig. 153 Installing Oil Pump And Reaction Shaft
Support
Fig. 154 Checking Input Shaft End Play
Fig. 155 Installing Accumulator Piston And Spring
Fig. 156 Valve Body Installation
21 - 154 30RH/32RH TRANSMISSION OVERHAULJ

(c) Back off front band adjusting screw as fol-
lows:
²On 30RH (2.5L), back adjusting screw off 2
1/2 turns
²On 32RH (4.0L), back adjusting screw off 2
1/4 turns
(d) Hold adjusting screw in position and tighten
locknut to 34 Nzm (25 ft. lbs.).
(2) Adjustrear bandas follows:
(a) Loosen locknut.
(b) Tighten adjusting screw as follows: On 32RH
transmission, tighten screw to 8 Nzm (72 in. lbs).
torque. On 30RH transmission. Tighten screw to 5
Nzm (41 in. lbs.) torque.
(c) Back off rear band adjusting screw as follows:
²On 30RH (2.5L), back adjusting screw off 7
turns
²On 32RH (4.0L), back adjusting screw off 4
turns
(d) Hold adjusting screw in place and tighten
locknut to 34 Nzm (25 ft. lbs.) torque.(3) Install new pan gasket on transmission and in-
stall oil pan. Tighten pan bolts to 17 Nzm (13 ft. lbs.).
(4) Turn transmission over.
EXTENSION HOUSING, CONTROL LEVER AND
CONVERTER INSTALLATION
(1) Install throttle valve and manual valve levers
on shaft.
(2) Position new extension adapter housing gasket
on transmission case. Use petroleum jelly to hold
gasket in place.
(3) Install new rear seal in extension housing if re-
quired.
(4) Install extension/adapter housing on transmis-
sion case. Tighten housing fasteners to 33 Nzm (24 ft.
lbs.). Be sure park lock rod is properly engaged in
sprag before tightening fasteners.
(5) Lubricate converter hub with transmission
fluid and carefully install converter. Turn converter
back and forth until seated. Be sure converter hub
slots are fully seated in oil pump gear lugs.
(6) Secure converter in oil pump before mounting
transmission on jack and before moving transmission
back under vehicle. Use metal strapping, C-clamp, or
locking pliers to hold converter in place. Attach hold-
ing tool to converter housing.
CAUTION: The transmission cooler and lines must
be reverse flushed if overhaul corrected a malfunc-
tion that generated sludge, metal particles, or
clutch friction material. The torque converter should
also be replaced if contaminated by the same mal-
function. Debris and residue not flushed from the
cooler and lines will flow back into the transmission
and converter. The result could be a repeat failure
and shop comeback.
Fig. 157 Fluid Filter Installation
J30RH/32RH TRANSMISSION OVERHAUL 21 - 155

(8) Tighten switch adjusting bolt to 13 Nzm(9ft.
lbs.) torque.
(9) Bend at least two washer lock tabs over switch
attaching nut to secure it.
(10) Connect shift linkage rod to shift lever on left
side of case.
(11) Connect switch wires to harness and lower ve-
hicle.
(12) Check switch operation. Engine should start
in Park and Neutral only.
TRANSMISSION VALVE BODY SOLENOIDS
SOLENOID REMOVAL
(1) Remove transmission oil pan drain plug and
drain fluid.
(2) Remove pan bolts and remove oil pan.
(3) Remove oil screen bolts and remove screen (Fig.
7) and gasket. Discard the gasket.(4) Disconnect solenoid wire connector (Fig. 8).
(5) If all solenoids are being removed, mark or tag
wires for assembly reference before disconnecting
them.
(6) Remove bolt attaching solenoids to valve body
and remove solenoids (Fig. 9). Do not allow any valve
body components to fall out when solenoids are re-
moved.
(7) Clean oil filter and pan with solvent and dry
with compressed air.
(8) Remove old sealer material from oil pan and
transmission case.
Solenoid Testing
Test solenoid resistance with an ohmmeter. Con-
nect the ohmmeter leads to the solenoid mounting
bracket and to the solenoid wire terminal (Fig. 10).
Fig. 8 Solenoid Wire Connectors
Fig. 9 Transmission Valve Body Solenoids
Fig. 6 Park/Neutral Position Switch Adjustment
Fig. 7 Oil Screen Removal/Installation
JAW-4 IN-VEHICLE SERVICE 21 - 175