1994 JEEP CHEROKEE transmission

(32) Remove governor body and park gear as as-
sembly (Fig. 20). Work park gear out of rear support
and slide assembly off output shaft.
(33) Remove planetary geartrain as assembly (Fig.
21). Support geartrain with both hands during re-
moval. Do not allow machined surfaces on output
shaft to become nicked or scratched.
(34) Loosen rear band adjusting screw until band
is fully released and does not grip low reverse drum.
(35) Remove snap ring that secures low-reverse
drum to rear support (Fig. 22).
(36) Remove rear band lever pins as follows:
(a) On 30RH transmission, rear band has only
one pivot pin. Remove pin with parallel jaw snap
ring pliers (Fig. 23). Spread plier jaws in pin bore
to grip pin. Then remove pin with a twist and pull
motion.(b) On 32RH transmission, rear band has two
pins. Remove pivot pin and reaction pin with par-
allel jaw snap ring pliers (Fig. 24).
(37) Remove rear band lever, link and strut.
(38) Mark position of rear support for assembly
reference (Fig. 25). Use scriber or center punch to
mark case and support.
(39) Remove rear support bolts and remove support
from low-reverse drum and case (Fig. 26). Keep rear
support bolts together for assembly reference.
(40) Remove bolts attaching overrunning clutch
cam to case (Fig. 27).
(41) Remove low-reverse drum and overrunning
clutch as assembly. Slide drum and clutch through
rear band and out of case. Set drum and clutch as-
sembly aside for cleaning and inspection.
(42) Remove rear band and link from case.
(43) Compress front servo rod guide about 3 mm
(1/8 in.) with Valve Spring Compressor Tool
C-3422-B (Fig. 28). A C-clamp and tool C-4470 can
also be used to compress rod guide.
Fig. 20 Removing/Installing Governor Body And
Park Gear
Fig. 21 Planetary Geartrain Removal
Fig. 22 Removing Low-Reverse Drum Snap Ring
Fig. 23 Removing Rear Band Lever Pivot Pin (30RH)
21 - 116 30RH/32RH TRANSMISSION OVERHAULJ

(44) Remove front servo rod guide snap ring (Fig.
28).Exercise caution when removing snap ring.
Servo bore can be scratched or nicked if care is
not exercised.
(45) Remove compressor tools and remove front
servo rod guide, spring and servo piston.
(46) Compress rear servo spring retainer about 1.5
mm (1/16 in.) with C-clamp and Tool C-4470 or SP-
5560 (Fig. 29). Valve Spring Compressor C-3422-B
can also be used to compress spring retainer.
(47) Remove rear servo spring retainer snap ring.
Then remove compressor tools and remove rear servo
spring and piston.
Fig. 26 Removing Rear Support
Fig. 27 Overrunning Clutch Cam Bolt Locations
Fig. 28 Compressing Front Servo Rod Guide
Fig. 24 Removing Rear Band Pivot And Reaction
Pins (32RH)
Fig. 25 Marking Rear Support For Assembly
Reference
J30RH/32RH TRANSMISSION OVERHAUL 21 - 117

OVERHAUL SERVICE INFORMATION
Inspect the transmission bushings during overhaul.
Bushing condition is important as severely worn, or
scored bushings contribute to low pressures, clutch
slip and accelerated wear of other components.How-
ever, do not replace bushings as a matter of
course. Replace bushings only when they are
actually worn, or scored.
Use recommended tools to replace bushings. The
tools are sized and designed to remove, install and
seat bushings correctly. The bushing replacement
tools are included in Bushing Tool Set C-3887-B. The
tool set is manufactured by Miller Tool Co. and is
available through the dealer tool program.
Pre-sized service bushings are available for replace-
ment purposes. Only the sun gear bushings are not
serviced. Low cost of the sun gear assembly makes it
easier to simply replace the gear and bushings as an
assembly.
Heli-Coil inserts are recommended for repairing
damaged, stripped or worn threads in aluminum
parts. These inserts are available from most automo-
tive jobbers. Stainless steel inserts are preferred.
The use of crocus cloth is permissible where neces-
sary. When used on valves, use care to avoid round-
ing off sharp edges. Sharp edges are vital as they
prevent foreign matter from getting between the
valve and valve bore.
Do not reuse oil seals, gaskets, seal rings, or O-
rings during overhaul. Replace these parts as a mat-
ter of course. Also do not reuse snap rings or E-clips
that are bent or distorted. Replace these parts as
well.
Lubricate transmission parts with Mopar ATF
Plus, Type 7176 transmission fluid during overhaul
and assembly.Use petroleum jelly to hold parts like thrust wash-
ers in place during assembly. Use Ru-Glyde, Door
Eze, or similar products to lubricate piston seals and
O-rings to ease installation. Petroleum jelly can also
be used to prelubricate parts during reassembly if de-
sired.
TRANSMISSION CASE CLEANING AND
INSPECTION
Clean the case in a solvent tank. Flush the case
bores and fluid passages thoroughly with solvent.
Dry the case and all fluid passages with compressed
air. Be sure all solvent is removed from the case and
that all fluid passages are clear.
Do not use shop towels or rags to dry the case
(or any other transmission component) unless
they are made from lint-free materials. Lint will
readily adhere to case surfaces and transmission
components and will circulate throughout the
transmission after assembly. A sufficient quan-
tity of lint can block fluid passages and interfere
with valve body operation.
Inspect the case for cracks, porous spots, worn
bores, or damaged threads. Damaged threads can be
repaired with Helicoil thread inserts. However, the
case will have to be replaced if it exhibits any type of
damage or wear.
Lubricate the front band adjusting screw threads
with petroleum jelly and thread the screw part-way
into the case. Be sure the screw turns freely.
Remount the case in a repair stand after cleaning
and inspection.
OVERRUNNING CLUTCHÐLOW-REVERSE
DRUMÐREAR SUPPORT OVERHAUL
DISASSEMBLING OVERRUNNING CLUTCH/
LOW-REVERSE DRUM
If the clutch assembly came out with the low-re-
verse drum, thread two clutch cam bolts into the
cam. Then lift the cam out of the drum with the bolts
(Fig. 30). Rotate the cam back and forth to ease re-
moval if necessary. Remove the clutch roller and
spring assembly from the race afterward.
CLEANING AND INSPECTION
Clean the overrunning clutch assembly, clutch
cam, low-reverse drum and rear support in solvent.
Dry them with compressed air after cleaning.
Inspect condition of each clutch part after cleaning.
Replace the overrunning clutch roller and spring as-
sembly if any rollers or springs are worn or dam-
aged, or if the roller cage is distorted, or damaged.
Replace the cam if worn, cracked or damaged.
Replace the low-reverse drum if the clutch race,
roller surface or inside diameter is scored, worn or
damaged.Do not remove the clutch race from the
Fig. 29 Compressing Rear Servo Spring
21 - 118 30RH/32RH TRANSMISSION OVERHAULJ

low-reverse drum under any circumstances. Re-
place the drum and race as an assembly if either
component is damaged.
Examine the rear support carefully for wear,
cracks, scoring or other damage. Be sure the support
hub is a snug fit in the case and drum. Replace the
support if worn or damaged.
ASSEMBLING OVERRUNNING CLUTCH/LOW-
REVERSE DRUM
(1) Assemble clutch rollers and springs in retainer
if necessary (Fig. 31).
(2) Install overrunning clutch roller, spring and re-
tainer assembly in clutch cam (Fig. 32).
(3) Temporarily assemble and check overrunning
clutch operation as follows:
(a) Assemble cam and clutch.
(b) Install clutch assembly on low-reverse drum
with twisting motion (Fig. 33).(c) Install drum-clutch assembly in case and in-
stall clutch cam bolts.
(d) Install rear support and support attaching
bolts.
(e) Check low-reverse drum rotation.Drum
should rotate freely in clockwise direction and
lock when turned in counterclockwise direc-
tion (as viewed from front of case).
(4) Note component position for assembly refer-
ence. Bolt holes in clutch cam are countersunk on
one side, Be sure this side of cam will face rearward
when installed (Fig. 34).
(5) Remove rear support, overrunning clutch and
low-reverse drum. Set components aside for final as-
sembly.If overrunning clutch will be installed
Fig. 30 Removing Overrunning Clutch From Low-
Reverse Drum
Fig. 31 Overrunning Clutch Rollers, Springs,
Retainer
Fig. 32 Assembling Overrunning Clutch And Cam
Fig. 33 Temporary Assembly Of Clutch And Drum
To Check Operation
J30RH/32RH TRANSMISSION OVERHAUL 21 - 119

before final assembly, install cam only as de-
scribed in Transmission Assembly And Adjust-
ment section. Clutch cam must be properly
indexed in case to fit and operate properly.
ADAPTER HOUSING AND PARK LOCK
COMPONENT OVERHAUL
Clean the housing and park lock components in
solvent and dry them with compressed air.
Inspect the output shaft bearing in the housing
(Fig. 35). Replace the bearing if worn, damaged, or
noisy.
Examine the park lock components in the housing.
If replacement is necessary, remove the shaft with
parallel jaw snap ring pliers (Fig. 36) and remove the
sprag and spring. Then remove the spring clip and
reaction plug (Fig. 37).Compress the reaction plug spring clip only
enough to remove or install it. The clip is easily
distorted if overcompressed. Replace the clip if
it becomes bent or distorted. Do not straighten
and reuse the clip if this occurs.
Be sure a replacement sprag is installed so the
sprag locking lug will face the park gear. Also be
sure the spring is correctly positioned as shown (Fig.
38).The sprag may not retract if the spring is
improperly installed.
Fig. 34 Assembled Overrunning Clutch Components
Fig. 35 Adapter Housing Bearing (4 x 4 Models)
Fig. 36 Park Sprag, Shaft And Spring Removal
Fig. 37 Park Sprag Reaction Plug And Spring
Location
21 - 120 30RH/32RH TRANSMISSION OVERHAULJ

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

(5) Tighten governor body attaching bolts finger
tight only. Bolts will not be final tightened until af-
ter governor and park gear are mounted on output
shaft.
OIL PUMP OVERHAUL
PUMP AND REACTION SHAFT SUPPORT
DISASSEMBLY
(1) Remove seal ring from housing and reaction
shaft support (Fig. 41).
(2) Mark pump housing and support assembly for
alignment reference.
(3) Loosen bolts that attach pump body to support
(Fig. 42).(4) Remove pump-to-support bolts and separate
support from pump housing (Fig. 43).
(5) Remove inner and outer gears from reaction
shaft support (Fig. 44).
(6) If pump seal was not removed during transmis-
sion disassembly, remove seal with punch and ham-
mer.
(7) Remove front clutch thrust washer from sup-
port hub (Fig. 45).
OIL PUMP AND REACTION SHAFT SUPPORT
CLEANING AND INSPECTION
Clean pump and reaction shaft support components
with solvent and dry them with compressed air.
Fig. 40 Park Gear And Seal Rings
Fig. 41 Removing Pump Seal Ring
Fig. 42 Loosening Pump Support Bolts
Fig. 43 Separating Pump Housing From Reaction
Shaft Support
Fig. 44 Pump Gear Removal
21 - 122 30RH/32RH TRANSMISSION OVERHAULJ

Inspect the pump housing and support components.
Replace the housing or support if the seal ring
grooves or machined surfaces are worn, scored, pit-
ted, or damaged.
Replace the pump gears if pitted, worn chipped, or
damaged. Inspect the thrust washer for wear or dam-
age. Replace the washer if necessary.Note that the
inner gear used in 1993 and later 30RH/32RH oil
pumps has a new design drive lug. The new de-
sign incorporates tapered drive flats instead of
the square lug used previously. The torque con-
verter hub has also been redesigned to accept
the new drive flats. If pump gear replacement is
necessary, be very sure to order and install the
correct style gears.
Inspect the pump and reaction shaft support bush-
ings. Minor bushing wear is acceptable. Replace the
bushings only if scored, or severely worn.
Install the gears in the pump housing and measure
end clearance with a feeler gauge and straightedge
(Fig. 46). Clearance should be 0.010 - 0.06 mm
(0.0004 - 0.0025 in.).
Measure clearance between the outer gear and the
pump body (Fig. 47). Clearance should be 0.08 - 0.19
mm (0.0035 - 0.0075 in.).
Measure gear tooth clearance with a feeler gauge.
Align one tooth of the outer gear in inner gear andmeasure clearance (Fig. 48). Clearance should be
0.08 - 0.19 mm (0.0035 - 0.0075 in.).
OIL PUMP BUSHING REPLACEMENT
(1) Remove pump bushing with Tool Handle
C-4171 and Bushing Remover SP-3551 (Fig. 49).
(2) Install new pump bushing with Tool Handle
C-4171 and Bushing Installer SP-5117 (Fig. 49).
Bushing should be flush with pump housing bore.
(3) Stake new pump bushing in two places with
blunt punch (Fig. 50). Remove burrs from stake
points with knife blade afterward.
REACTION SHAFT SUPPORT BUSHING
REPLACEMENT
(1) Assemble Bushing Remover Tools SP-1191,
Fig. 45 Oil Pump And Reaction Shaft Support Components (All)
Fig. 46 Measuring Pump Gear End Clearance
J30RH/32RH TRANSMISSION OVERHAUL 21 - 123