1994 JEEP CHEROKEE Service Repair Manual

VALVE BODY DISASSEMBLY AND INSPECTION
CAUTION: Do not clamp any part of the valve body as-
sembly (Fig. 101) in a vise. This practice will distort
the valve body and transfer plate resulting in valve
bind. Slide valves and plugs out carefully. Do not use
force at any time. The valves and valve body will be
damaged if force is used. Also tag or mark the valve
body springs for reference as they are removed. Do
not allow them to become intermixed.
(1) Remove screws attaching adjusting screw bracket
to valve body and transfer plate. Hold bracket firmly
against spring force while removing last screw.
(2) Remove adjusting screw bracket, line pressure ad-
justing screw, pressure regulator spring and switch
valve spring (Fig. 102).Do not remove throttle pres-
sure adjusting screw from bracket and do not dis-
turb adjusting screw settings during removal.
(3) Secure detent ball and spring in housing with
retainer tool 6583 (Fig. 103).
(4) Remove manual shaft E-clip and washer (Fig.
104).(5) Pull manual shaft and park rod assembly upward
out of valve body and off throttle lever (Fig. 104).
(6) Remove Retainer Tool 6583. Then remove and
retain detent ball and spring.
(7) Remove throttle lever (Fig. 104).
(8) Remove park rod E-clip and separate rod from
manual lever (Fig. 105).
Fig. 102 Adjusting Screw Bracket And Spring Removal
Fig. 103 Securing Detent Ball And Spring With
Retainer Tool
Fig. 104 Removing Manual And Throttle Levers
Fig. 100 Installing Rear Servo Piston Seal
Fig. 101 Valve Body Assembly
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(9) Remove screws attaching converter clutch mod-
ule to valve body and remove module and connecting
tube (Fig. 106).
(10) Turn valve body over so transfer plate is fac-
ing upward (Fig. 107). With valve body in this posi-
tion, valve body check balls will remain in place and
not fall out when transfer plate is removed.
(11) Remove screws attaching transfer plate to
valve body (Fig. 107).
(12) Remove transfer plate and separator plate
from valve body. Note position of filter and clutch so-
lenoid for reference (Fig. 108).
(13) Position transfer plate on bench so separator
plate, filter and lockup solenoid are facing up. This
will avoid having rear clutch and rear servo check
balls fall out when plates are separated.
(14) Remove screws attaching separator plate to
transfer plate.
(15) Remove converter clutch solenoid from separa-
tor plate (Fig. 109). A T25 torx bit is required to re-
move solenoid attaching screw.
(16) Note position of filter, solenoid and rear
clutch/rear servo check balls for assembly reference
(Fig. 110).
(17) Remove shuttle valve end plate (Fig. 111).(18) Remove shuttle valve E-clip and remove sec-
ondary spring and spring guides from end of valve
(Fig. 111).
Fig. 105 Park Rod Removal
Fig. 106 Clutch Module And Connecting Tube
Removal/Installation
Fig. 107 Valve Body-To-Transfer Plate Screw
Locations
Fig. 108 Transfer Plate Removal/Installation
Fig. 109 Converter Clutch Solenoid Removal
J30RH/32RH TRANSMISSION OVERHAUL 21 - 139

(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
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(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