front JEEP CHEROKEE 1994 Service Repair Manual

(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

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

CAUTION: The pump inner gear is a one way fit.
The bore on one side of the gear inside diameter
(I.D.) is chamfered. Be sure the chamfered side
faces forward (to front of pump).
(6) Install new thrust washer on hub of reaction
shaft support. Lubricate washer with transmission
fluid or petroleum jelly.
(7) If reaction shaft seal rings are being replaced,
install new seal rings on support hub (Fig. 54). Lu-
bricate seal rings with transmission fluid or petro-
leum jelly after installation. Squeeze each ring until
ring ends are securely hooked together.
CAUTION: The reaction shaft support seal rings will
break if overspread, or twisted. If new rings are be-
ing installed, spread them only enough for installa-
tion. Also be very sure the ring ends are securely
hooked together after installation. Otherwise, the
rings will either prevent pump installation, or break
during installation.
(8) Install reaction shaft support on pump housing
(Fig. 55).
(9) Align reaction support on pump housing. Use
alignment marks made at disassembly. Or, rotatesupport until bolt holes in support and pump housing
are all aligned (holes are offset for one-way fit).
(10) Install all bolts that attach support to pump
housing. Then tighten bolts finger tight.
(11) Tighten support-to-pump bolts to required
torque as follows:
(a) Reverse pump assembly and install it in
transmission case. Position pump so bolts are fac-
ing out and are accessible.
(b) Secure pump assembly in case with 2 or 3
bolts, or with pilot studs.
(c) Tighten support-to-pump bolts to 20 Nzm (15
ft. lbs.).
(d) Remove pump assembly from transmission case.
(12) Install new oil seal in pump with Special Tool
C-4193 and Tool Handle C-4171 (Fig. 56). Be sure
seal lip faces inward.
(13) Install new seal ring around pump housing.
Be sure seal is properly seated in groove.
(14) Lubricate lip of pump oil seal and O-ring seal
with transmission fluid.
FRONT CLUTCH OVERHAUL
FRONT CLUTCH DISASSEMBLY
(1) Remove waved snap ring and remove pressure
plate, clutch plates and clutch discs (Fig. 57).
(2) Compress clutch piston spring with Compressor
Tool C-3575-A (Fig. 58). Be sure legs of tool are
seated squarely on spring retainer before compress-
ing spring.
Fig. 52 Supporting Pump And Installing Outer Gear
Fig. 53 Pump Inner Gear Installation
Fig. 54 Hub Seal Ring Position
Fig. 55 Assembling Reaction Shaft Support And
Pump Housing
J30RH/32RH TRANSMISSION OVERHAUL 21 - 125

(3) Remove retainer snap ring and remove com-
pressor tool.
(4) Remove spring retainer and clutch spring. Note
position of retainer on spring for assembly reference.
(5) Remove clutch piston from clutch retainer. Re-
move piston by rotating it up and out of retainer.
(6) Remove seals from clutch piston and clutch re-
tainer hub. Discard both seals as they are not reusable.
FRONT CLUTCH INSPECTION
Clean the front clutch components in solvent and dry
them with compressed air only. Do not use rags or shop
towels to dry any of the clutch parts. Lint from such
materials will adhere to the component surfaces and
could restrict or block fluid passages after assembly.
Replace the clutch discs if warped, worn, scored,
burned or charred, or if the facing is flaking off. Re-
place the steel plates if heavily scored, warped, orbroken. Be sure the driving lugs on the plates are in
good condition. The lugs must not be bent, cracked or
damaged in any way.
Replace the clutch spring and spring retainer if ei-
ther is distorted, warped or broken.
Check the lug grooves in the clutch retainer. The
steel plates should slide freely in the slots. Replace
the retainer if the grooves are worn or damaged.
Check action of the check ball in the retainer (Fig.
59). The ball must move freely and not stick.
Inspect the clutch retainer bushings carefully
(Fig. 60). The retainer bushings are not service-
Fig. 56 Pump Oil Seal Installation
Fig. 57 Front Clutch Components (30RH/32RH)
Fig. 58 Compressing Front Clutch Piston Spring
21 - 126 30RH/32RH TRANSMISSION OVERHAULJ

able. It will be necessary to replace the retainer
if either bushing is scored, or worn.
Inspect the piston and retainer seal surfaces for
nicks or scratches. Minor scratches can be removed
with crocus cloth. However, replace the piston and/or
retainer if the seal surfaces are seriously scored.
FRONT CLUTCH ASSEMBLY
(1) Soak clutch discs in transmission fluid while
assembling other clutch parts.
(2) Install new seals on piston and in hub of re-
tainer. Be sure lip of each seal faces interior of clutch
retainer.
(3) Lubricate lips of piston and retainer seals with
liberal quantity of Door Eze, or petroleum jelly. Then
lubricate retainer hub, bore and piston with trans-
mission fluid.
(4) Install clutch piston in retainer (Fig. 61). 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.
(5) Position spring in clutch piston (Fig. 62).(6) Position spring retainer on top of piston spring
(Fig. 63).Make sure retainer is properly in-
stalled. Small raised tabs should be facing up-
ward. Semicircular lugs on underside of retainer
are for positioning retainer in spring.
(7) Compress piston spring and retainer with Com-
pressor Tool C-3575-A (Fig. 64). Then install new
snap ring to secure spring retainer and spring.
(8) Install clutch plates and discs (Fig. 57). Install steel
plate then disc until all plates and discs are installed.
(9) Install pressure plate and waved snap ring
(Fig. 57).
(10) Check clutch plate clearance (Fig. 64). Clear-
ance should be 1.70 to 3.40 mm (0.067 to 0.134 in.).
If clearance is incorrect, clutch discs, plates pressure
plates and snap ring may have to be changed.
Fig. 59 Front Clutch Piston Retainer Check Ball Location
Fig. 60 Retainer Bushing Locations
Fig. 61 Front Clutch Piston Installation
Fig. 62 Clutch Piston Spring Installation
Fig. 63 Correct Spring Retainer Installed Position
J30RH/32RH TRANSMISSION OVERHAUL 21 - 127

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

Replace the piston spring and wave spring if either
part is distorted, warped or broken.
Check the lug grooves in the clutch retainer. The
clutch and pressure plates should slide freely in the
slots. Replace the retainer if the grooves are worn or
damaged. Also check action of the check balls in the
retainer and piston. Each check ball must move
freely and not stick.
Replace the retainer bushing if worn, scored, or
doubt exists about bushing condition.Inspect the piston and retainer seal surfaces for
nicks or scratches. Minor scratches can be removed
with crocus cloth. However, replace the piston and/or
retainer if the seal surfaces are seriously scored.
Check condition of the fiber thrust washer and
metal output shaft thrust washer. Replace either
washer if worn or damaged.
Check condition of the seal rings on the input shaft
and clutch retainer hub. Replace the seal rings only
if worn, distorted, or damaged. The input shaft front
Fig. 66 Rear Clutch Components (32RH)
Fig. 67 Removing/Installing Input Shaft Snap RingFig. 68 Pressing Input Shaft Out Of Rear Clutch
Retainer
J30RH/32RH TRANSMISSION OVERHAUL 21 - 129