1995 JEEP YJ transmission fluid

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
seal ring is teflon with chamfered ends. The rear ring
is metal with interlocking ends.
Check the input shaft for wear, or damage. Replace
the shaft if worn, scored or damaged in any way.
ASSEMBLING REAR CLUTCH
(1) Soak clutch discs in transmission fluid while
assembling other clutch parts.
(2) Install new seal rings on clutch retainer hub
and input shaft if necessary (Fig. 74).
(a) Be sure clutch hub seal ring is fully seated in
groove and is not twisted.
(b) Note that input shaft front seal ring is teflon
and rear seal ring is metal (Fig. 75). Be sure cham-
fered ends of teflon ring are properly joined and
that ends of rear ring are securely hooked together.
Lubricate both rings with transmission fluid after
installation.
(3) Lubricate splined end of input shaft and clutch
retainer with transmission fluid. Then press input
shaft into retainer (Fig. 76).
(4) Install input shaft snap ring (Figs. 70-71).
(5) Install new seals on clutch piston. Be sure lip
of each seal faces interior of clutch retainer.
(6) Lubricate lip of piston seals with generous
quantity of Mopar Door Ease, or Ru-Glyde. Then lu-
bricate retainer hub and bore with light coat of
transmission fluid.(7) Install clutch piston in retainer. Use twisting
motion to seat piston in bottom of retainer. A thin
strip of plastic (about 0.0209thick), can be used to
guide seals into place if necessary.
CAUTION: Never push the clutch piston straight in.
This will fold the seals over causing leakage and
clutch slip. In addition, never use any type of metal
tool to help ease the piston seals into place. Metal
tools will cut, shave, or score the seals.
Fig. 73 Pressing Input Shaft Out Of Rear Clutch
Retainer
Fig. 74 Rear Clutch Retainer And Input Shaft Seal
Ring Installation
Fig. 75 Input Shaft Seal Ring Identification
J30RH/32RH TRANSMISSION OVERHAUL 21 - 139

planetary. All the washers have four locating tabs on
them. These tabs fit in the holes or slots provided in
each planetary gear.
Inspect the output shaft carefully. Pay particular
attention to the machined bushing/bearing surfaces
on the shaft and the governor valve shaft bore at the
shaft rear.
Replace the output shaft if the machined surfaces
are scored, pitted, or damaged in any way. Also re-
place the shaft if the splines are damaged, or exhib-
it cracks at any location (especially at the governor
valve shaft bore).
The annulus gears can be removed from their sup-
ports if necessary. Just remove the snap rings and sep-
arate the two parts when replacement is necessary. In
addition, the annulus gear bushings can be replaced if
severely worn, or scored. However it is not necessary to
replace the bushings if they only exhibit normal wear.
Check bushing fit on the output shaft to be sure.
ASSEMBLING PLANETARY GEARTRAIN
(1) Lubricate output shaft and planetary components
with transmission fluid. Use petroleum jelly to lubricate
and hold thrust washers and plates in position.
(2) Assemble rear annulus gear and support if dis-
assembled. Be sure support snap ring is seated and
that shoulder-side of support faces rearward (Fig.
85).(3) Install rear thrust washer on rear planetary
gear (Fig. 84). Use enough petroleum jelly to hold
washer in place. Also be sure all four washer tabs are
properly engaged in gear slots.
(4) Install rear annulus over and onto rear plane-
tary gear (Fig. 85).
Fig. 84 Planetary Geartrain Components (30RH/32RH)
Fig. 85 Assembling Rear Annulus And Planetary
Gear
21 - 142 30RH/32RH TRANSMISSION OVERHAULJ

FRONT SERVO AND BAND OVERHAUL
FRONT SERVO DISASSEMBLY (FIG. 101)
(1) Remove small snap ring from servo piston.
(2) Remove piston, rod, springs and guide.
(3) Remove and discard servo piston rings and O-
ring.
FRONT SERVO AND BAND INSPECTION
Clean the servo components with solvent and dry
them with compressed air.
Inspect the servo components. Replace the springs
if collapsed, distorted or broken. Replace the guide,
rod and piston if cracked, bent, or worn. Discard the
servo snap ring if distorted or warped.
Replace the front band if distorted, the lining is
burned or flaking off, or excessively worn.
Check the servo piston bore for wear. Replace the
piston and rod as an assembly if either part is worn
or damaged.
Replace any servo component if doubt exists about
its condition. Do not reuse suspect parts.
ASSEMBLING FRONT SERVO PISTON
(1) Lubricate servo parts with transmission fluid.
(2) Install new O-ring on servo piston rod.
(3) Install new seal on piston rod guide and install
new seal rings on piston.
(4) Assemble rod, piston, servo springs and snap
ring (Fig. 101).
REAR SERVO AND BAND OVERHAUL
REAR SERVO PISTON DISASSEMBLY
(1) Remove seal from servo piston. Note which way
seal lip faces for assembly reference.(2) Compress cushion spring in vise only enough to
allow piston plug snap ring removal (Fig. 102). Use
wood block between vise jaws and end of piston plug
to keep plug aligned and in position.
(3) Remove snap ring from end of piston plug (Fig.
102).
(4) Open vise and remove wood block, piston plug,
cushion spring and servo piston.
REAR SERVO INSPECTION
Clean the servo components with solvent and dry
them with compressed air.
Check rear band condition. Replace the band if dis-
torted, the lining is burned or flaking off, or the lin-
ing is excessively worn.
On 30RH models, inspect the rear band link (Fig.
103). Replace the link if bent, or damaged. Check the
band reaction pin. Replace the O-rings if they are
cut, or torn. Minor pin scoring can be cleaned up
with crocus cloth. However, replace the pin if worn,
severely scored, or cracked.
Fig. 101 Front Servo Components
Fig. 102 Removing/Installing Servo Piston Plug
Snap Ring
Fig. 103 Rear Band Components (30RH Shown)
21 - 146 30RH/32RH TRANSMISSION OVERHAULJ

Inspect the servo components (Fig. 104). Replace
the servo and cushion springs if collapsed, distorted
or broken. Replace the plug or piston if cracked, bent,
or worn. Discard the servo snap ring and spring re-
tainer if distorted or warped.
If doubt exists about the condition of any servo
component, replace it. Do not reuse suspect parts.
ASSEMBLING REAR SERVO PISTON
(1) Assemble piston plug, cushion spring and pis-
ton (Fig. 104).
(2) Compress cushion spring in vise and install pis-
ton plug snap ring.
(3) Install new seal on piston. Be sure seal lip is
toward servo bore (Fig. 105).
(4) Lubricate piston seal with petroleum jelly. Lu-
bricate other servo parts with transmission fluid.
VALVE BODY DISASSEMBLY AND INSPECTION
CAUTION: Do not clamp any part of the valve body
assembly (Fig. 106) in a vise. This practice will dis-
tort the valve body and transfer plate resulting invalve 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 inter-
mixed.
(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
adjusting screw, pressure regulator spring and switch
valve spring (Fig. 107).Do not remove throttle
pressure adjusting screw from bracket and do
not disturb adjusting screw settings during re-
moval.
Fig. 104 Rear Servo Components
Fig. 105 Installing Rear Servo Piston Seal
Fig. 106 Valve Body Assembly
Fig. 107 Adjusting Screw Bracket And Spring
Removal
J30RH/32RH TRANSMISSION OVERHAUL 21 - 147

(24) Remove 1-2 shift control valve and spring
from valve body (Fig. 118).
(25) Remove 2-3 shift valve and spring from valve
body (Fig. 118).
(26) Remove 1-2 shift valve and spring from valve
body (Fig. 118).
(27) Remove regulator valve end plate (Fig. 118).
(28) Remove regulator valve line pressure plug,
pressure plug sleeve, throttle pressure plug and
spring (Fig. 118).
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, orany 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.
Fig. 117 Control Valves And Governor Plugs
21 - 150 30RH/32RH TRANSMISSION OVERHAULJ

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 Mopar ATF Plus transmission fluid.
(2) Insert rear clutch and rear servo check balls in
transfer plate (Fig. 120).
(3) Install filter screen in separator plate (Fig.
120).
(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. 120).
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
check balls in valve body (Fig. 121). There are a total
of seven check balls; The one large check ball is ap-
proximately 11/32 inch in diameter. The remaining
check balls are approximately 1/4 inch in diameter.
Note that check balls will be steel on some very early
production models and plastic on later production
models.
(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 lockup module and compo-
nents on valve body (Fig. 122).
(9) Assemble regulator valve line pressure plug,
sleeve, throttle plug and spring (Fig. 113). 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. 118).
(11) Install 1-2 shift control valve and spring (Fig.
118)
(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. 118).
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. 117).
(17) Install throttle valve and spring. Then install
kickdown valve and detent (Fig. 117).
(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. 108).
Fig. 120 Installing Converter Clutch Solenoid
Fig. 121 Correct Position Of Valve Body Check Balls
J30RH/32RH TRANSMISSION OVERHAUL 21 - 153

justment must be performed properly and in the cor-
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. 124).
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. 125).
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 componentsclean. Also make sure the tools and workbench area
used for assembly are equally clean.
Shop towels used for wiping off your hands and
service tools must be made oflint freematerials.
Lint will adhere to transmission parts and could in-
terfere with valve operation, or even restrict fluid
passages.
Lubricate the transmission components with Mopar
ATF Plus during reassembly. Use Mopar Door-Ease,
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 assem-
bled. Also verify that thrust washers, thrust plates
and seal rings are correctly positioned before assem-
bly. These parts can interfere with proper assembly 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.
Fig. 124 Line Pressure Adjustment
Fig. 125 Throttle Pressure Adjustment
J30RH/32RH TRANSMISSION OVERHAUL 21 - 155

OVERRUNNING CLUTCH INSTALLATION
(1) Examine bolt holes in overrunning clutch cam.
Note that one hole isnot threaded(Fig. 126). This
hole must align with blank area in clutch cam bolt
circle (Fig. 127).
(2) Mark location of non threaded hole in clutch
cam and blank area of case with paint stripe (Fig.
128).
(3) Align and install overrunning clutch cam in
case (Fig. 128).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. 128).
(5) Verify that non threaded hole in clutch cam is
properly aligned (Fig. 128). 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 rear
band, one pivot pin and a band link to connect the
lever (Fig. 129). The lever adjusting screw is in direct
contact with the servo piston. A strut is used to con-
nect the lever to the band lug.
Fig. 126 Location Of Non-Threaded Hole In Clutch Cam
Fig. 127 Location Of Blank Area In Clutch Cam Seat
Of Case
Fig. 128 Overrunning Clutch Cam Alignment
Fig. 129 Rear Band Components (30RH)
21 - 156 30RH/32RH TRANSMISSION OVERHAULJ