1994 JEEP CHEROKEE transmission

(19) Remove governor valve end plate (Fig. 112).
(20) Remove switch valve and pressure regulator
valve from valve body (Fig. 112).
(21) Remove throttle valve and spring, kickdown
valve and detent and manual valve from valve body
(Fig. 112).
(22) Remove 1-2 and 2-3 shift valve governor plugs
from valve body (Fig. 112).
(23) Remove shuttle valve throttle plug, primary
spring and shuttle valve from valve body (Fig. 112).
Fig. 110 Transfer And Separator Plates
Fig. 111 Shuttle Valve E-Clip And Secondary Spring
Location
Fig. 112 Control Valves And Governor Plugs
21 - 140 30RH/32RH TRANSMISSION OVERHAULJ

(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

Inspect the valves and plugs for scratches, burrs,
nicks, or scores. Also inspect the coating on the alu-
minum valves and plugs (Fig. 114). If the coating is
damaged or worn through, the valve (or valve body)
should be replaced.
Aluminum valves and plugs should not be sanded
or polished under any circumstances. However, mi-
nor burrs or scratches on steel valves and plugs can
be removed with crocus cloth but do not round off the
valve or plug edges. Squareness of these edges is vi-
tally important. These edges prevent foreign matter
from lodging between the valves, plugs and bore.
Inspect all the valve and plug bores in the valve
body. Use a penlight to view the bore interiors. Re-place the valve body if any bores are distorted or
scored. Inspect all of the valve body springs. The
springs must be free of distortion, warpage or broken
coils.
Trial fit each valve and plug in its bore to check
freedom of operation. When clean and dry, the valves
and plugs should drop freely into the bores. Valve
body bores do not change dimensionally with use. If
the valve body functioned correctly when new, it will
continue to operate properly after cleaning and in-
spection. It should not be necessary to replace a
valve body assembly unless it is damaged in han-
dling.
21 - 142 30RH/32RH TRANSMISSION OVERHAULJ

Fig. 114 Valve Body Components (Alum. Indicates Aluminum Part)
J30RH/32RH TRANSMISSION OVERHAUL 21 - 143

VALVE BODY ASSEMBLY AND ADJUSTMENT
CAUTION: Do not force valves or plugs into place
during reassembly. If the valve body bores, valves
and plugs are free of distortion or burrs, the valve
body components should all slide into place easily.
In addition, do not overtighten the transfer plate
and valve body screws during reassembly. Over-
tightening can distort the valve body resulting in
valve sticking, cross leakage and unsatisfactory op-
eration. Tighten valve body screws to recom-
mended torque only.
(1) Lubricate valve body bores, valves and plugs
with ATF Plus, or Dexron IIŸ transmission fluid.
(2) Insert rear clutch and rear servo check balls in
transfer plate (Fig. 110).
(3) Install filter screen in separator plate (Fig.
110).
(4) Align and install separator plate on transfer
plate. Verify check ball position before installing sep-
arator plate on transfer plate.
(5) Install new O-ring on converter clutch solenoid
and insert solenoid in separator plate (Fig. 115).
Then secure solenoid in position with attaching
screw. Tighten screw to 4 Nzm 35 in. lbs.) torque.
(6) Position valve body so internal passages and
check ball seats are facing upward. Then install
steel/plastic check balls in valve body (Fig. 116). The
one large check ball is approximately 11/32 inch in
diameter. The remaining check balls are approxi-
mately 1/4 inch in diameter.
(7) Align and install assembled transfer and sepa-
rator plates on valve body. Install and tighten valve
body screws alternately in a diagonal pattern to 4
Nzm (35 in. lbs.) torque.
(8) Assemble and install clutch module and compo-
nents on valve body (Fig. 117).
(9) Assemble regulator valve line pressure plug,
sleeve, throttle plug and spring (Fig. 108). Insert as-
sembly in valve body and install end plate. Tighten
end plate screws to 4 Nzm (35 in. lbs.) torque.
(10) Install 1-2 and 2-3 shift valves and springs
(Fig. 113).(11) Install 1-2 shift control valve and spring (Fig.
113)
(12) Install shuttle valve as follows:
(a) Insert shuttle valve in bore.
(b) Insert plastic guides in shuttle valve second-
ary spring.
(c) Install spring on end of valve.
(d) Hold shuttle valve in place. Then compress
secondary spring and install E-clip in groove at end
of valve.
(e) Verify that spring and E-clip are properly
seated before proceeding.
(13) Install shuttle valve cover plate (Fig. 113).
Tighten end plate screws to 4 Nzm (35 in. lbs.)
torque.
(14) Install 1-2 and 2-3 valve governor plugs in
valve body (Fig. 113). Then install shuttle valve pri-
mary spring and throttle plug.
(15) Align and install governor plug end plate on
valve body and install end plate screws. Tighten
screws to 4 Nzm (35 in. lbs.) torque.
(16) Install manual valve (Fig. 112).
(17) Install throttle valve and spring. Then install
kickdown valve and detent (Fig. 112).
(18) Install pressure regulator valve and switch
valve in valve body.
(19) Install manual lever detent spring in housing.
Place detent ball on end of spring and push ball and
spring into housing. Secure ball and spring with De-
tent Retainer 6583 (Fig. 103).
(20) Insert line pressure adjusting screw in adjust-
ing screw bracket (Fig. 102).
Fig. 116 Correct Position Of Valve Body Check Balls
Fig. 115 Installing Converter Clutch Solenoid
21 - 144 30RH/32RH TRANSMISSION OVERHAULJ

(21) Install spring on end of line pressure regula-
tor valve.
(22) Install switch valve spring on tang at end of
adjusting screw bracket (Fig. 102).
(23) Position adjusting screw bracket on valve
body. Align valve springs and press bracket into
place. Install short, upper bracket screws first and
long bottom screw last. Verify that valve springs and
bracket are properly aligned. Then tighten all three
bracket screws to 4 Nzm (35 in. lbs.) torque.
(24) Install module and connecting tube. Be sure
long end of tube goes to module (Fig. 106). Tighten
module screws to 4 Nzm (35 in. lbs.) torque.
(25) Install throttle lever in valve body. Then in-
stall manual lever over throttle lever and start man-
ual lever into valve body.
(26) Align manual lever detent with detent ball
and align lever arm with manual valve. Hold throttle
lever upward. Then press down on manual lever un-
til lever is fully seated.
(27) Install manual lever seal, washer and retain-
ing E-clip.
(28) Lubricate shaft of manual lever with light
coat of petroleum jelly. This will help protect seal lip
when manual shaft seal is installed.
(29) Verify that throttle lever is aligned with end
of kickdown valve stem and that manual lever arm is
engaged in manual valve (Fig. 118).
(30) If line pressure and/or throttle pressure ad-
justment screw settings were not disturbed, continue
with overhaul or reassembly. However, if adjustmentscrew settingsweremoved or changed, readjust as
described in Valve Body Control Pressure Adjust-
ment procedure.
VALVE BODY CONTROL PRESSURE
ADJUSTMENTS
There are two control pressure adjustments on the
valve body which are, line pressure and throttle pres-
sure.
The two pressures are interdependent because each
affects shift quality and timing. Each pressure ad-
justment must be performed properly and in the cor-
Fig. 118 Manual And Throttle Lever Alignment
Fig. 117 Converter Clutch Module Components
J30RH/32RH TRANSMISSION OVERHAUL 21 - 145

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

(2) Mark location of non threaded hole in clutch
cam and blank area of case with paint stripe (Fig.
123).
(3) Align and install overrunning clutch cam in
case (Fig. 123).Be sure cam is correctly installed.
Bolt holes in cam are slightly countersunk on
one side. This side of cam faces rearward (to-
ward rear support).
(4) Partially install overrunning clutch in cam
(Fig. 123).
(5) Verify that non threaded hole in clutch cam is
properly aligned (Fig. 123). Check alignment by
threading a clutch cam bolt into each hole. Adjust
cam position if necessary before proceeding.
(6) Seat overrunning clutch in clutch cam after
verifying correct cam alignment.
(7) Install overrunning clutch cam bolts.Clutch
cam bolts are shorter than rear support bolts.
Tighten cam bolts to 17 Nzm (150 in. lbs. or 13 ft.
lbs.) torque.(8) Lubricate overrunning clutch rollers, springs
and cam with ATF Plus transmission fluid.
REAR BAND, LOW-REVERSE DRUM AND REAR
SUPPORT INSTALLATION
A different rear band and linkage is used in 30RH
and 32RH transmissions.
The 30RH transmission has a single wrap band,
one pivot pin and a band link to connect the lever
(Fig. 124). The lever adjusting screw is in direct con-
tact with the servo piston. A strut is used to connect
the lever to the band lug.
The 32RH transmission has a double wrap band, a
pivot pin, and a reaction pin (Fig. 125). The band le-
ver pivots against a lug on the band. A strut is not
used. The reaction pin functions as the stop, or locat-
ing mechanism for the band lower lug.
Rear Band Installation Procedure
(1) On 32RH transmission, install band compo-
nents and low-reverse drum as follows:
(a) Install reaction pin in case (Fig. 126).
(b) Position band in case and seat band lug
against reaction pin.
(c) Slide low-reverse drum through band (Fig.
127). Then tilt drum slightly and start clutch race
into overrunning clutch rollers.
(d) Rotate drum in clockwise direction and push
drum inward until race is seated in overrunning
clutch.
(e) Install rear band lever (Fig. 128). Be sure le-
ver pivot pin is fully seated in case afterward.
(2) On 30RH transmission, install band compo-
nents and low-reverse drum as follows:
Fig. 123 Overrunning Clutch Cam Alignment
Fig. 121 Location Of Non-Threaded Hole In Clutch
Cam
Fig. 122 Location Of Blank Area In Clutch Cam Seat
Of Case
J30RH/32RH TRANSMISSION OVERHAUL 21 - 147