1995 JEEP YJ torque

(15) Apply 3 mm (1/8 in.) wide bead of Mopar Gas-
ket Maker, or Loctite 518 to sealing surface of
adapter or extension housing. Keep sealer bead in-
side bolt holes as shown in Figure 111.
(16) Align and install adapter or extension housing
on intermediate plate (Fig. 119). Be sure housing is
seated on intermediate plate dowel pins.(17) Coat threads of housing attaching bolts with
Mopar silicone sealer. Then install and tighten bolts
to 37 Nzm (27 ft. lbs.) torque.
(18) Install detent ball (Fig. 120).
(19) Install detent spring (Fig. 121).
Fig. 116 Reverse Pin Position
Fig. 117 Access Plug Removal/Installation
Fig. 118 Roll Pin Removal/Installation
Fig. 119 Adapter/Extension Housing Installation
Fig. 120 Installing Detent Ball
Fig. 121 Installing Detent Spring
21 - 64 AX 15 MANUAL TRANSMISSIONJ

(20) Install detent access plug (Fig. 122). Tighten
plug to 19 Nzm (14 ft. lbs.) torque.
(21) Lubricate shift arm shaft and install it in
adapter housing (Fig. 123).
(22) Position shift arm in adapter housing (Fig.
124). Be sure arm is engaged in shift rails.
(23) Align shift arm with shaft and push shaft into
arm.
(24) Rotate shift arm shaft until set screw holes in
shaft and arm are aligned.
(25) Install and tighten shift arm set screw to 38
Nzm (28 ft. lbs.) torque (Fig. 125).
(26) Install and tighten restrictor pins to 19 Nzm
(14 ft. lbs.) torque (Fig. 125).
(27) Install and tighten shift arm shaft access plug
to 19 Nzm (14 ft. lbs.) torque (Fig. 126).
Fig. 122 Installing Detent Access Plug
Fig. 123 Installing Shift Arm Shaft
Fig. 124 Shift Arm Installation
Fig. 125 Set Screw And Restrictor Pin Installation
Fig. 126 Access Plug Installation
JAX 15 MANUAL TRANSMISSION 21 - 65

(28) Position new shift tower gasket on adapter
housing (Fig 127).
(29) Install shift tower (Fig. 128). Tighten tower
attaching bolts to 18 Nzm (13 ft. lbs.) torque.(30) Install new gasket on backup light switch and
install switch. Tighten switch to 37 Nzm (27 ft. lbs.)
torque.
(31) Install new washer on drain plug. Then install
and tighten plug to 37 Nzm (27 ft. lbs.) torque.
(32) If transmission will be filled with gear lubri-
cant before installation, place transmission in a level
position. Then fill with Mopar 75W-90, grade GL-5
gear lubricant.
(33) Install new washer on fill plug. Then install
and tighten plug to 37 Nzm (27 ft. lbs.) torque.
(34) Install clutch housing and hydraulic concen-
tric bearing.
(35) On models with extension housing, install new
seal in housing with suitable size installer tool (Fig.
129). Lubricate seal lips with petroleum jelly before
installation.
(36) On models with extension housing, install
speedometer driven gear, speedometer adapter and
speed sensor.
Fig. 127 Shift Tower Gasket Installation
Fig. 128 Shift Tower Installation
Fig. 129 Installing Extension Housing Seal
21 - 66 AX 15 MANUAL TRANSMISSIONJ

30RH/32RH AUTOMATIC TRANSMISSION
GENERAL INFORMATION
INDEX
page page
Recommended Fluid....................... 67
Torque Converter......................... 67
Transmission Application.................... 67
Transmission Changes and Parts Interchangeability.. 67
Transmission Controls and Components........ 67
Transmission Identification.................. 67
TRANSMISSION APPLICATION
Chrysler 30RH and 32RH automatic transmissions
are used in XJ/YJ models. Both are 3-speed auto-
matic transmissions with a gear-type oil pump, two
clutches and bands and a planetary gear system (Fig.
1).
The 30RH is used in XJ/YJ models with a 2.5L en-
gine. The 32RH is used in YJ models with a 4.0L en-
gine.
TORQUE CONVERTER
A three element, torque converter is used for all
applications. The converter consists of an impeller,
stator, and turbine.
The converter used with 30RH/32RH transmissions
has a converter clutch. The clutch is engaged by an
electrical solenoid and mechanical module on the
valve body. The solenoid is operated by the power-
train control module.
The torque converter is a welded assembly and is
not a repairable component. The converter is serviced
as an assembly.
RECOMMENDED FLUID
The recommended and preferred fluid for 30RH/
32RH transmissions is Mopar ATF Plus, Type 7176.
Dexron II is not really recommended and should
only be used when ATF Plus is not available.
TRANSMISSION IDENTIFICATION
The transmission identification numbers are
stamped on the left side of the case just above the oil
pan gasket surface (Fig. 2). The first set of numbers
is the transmission part number. The next set of code
numbers set is the date of build. The final set of code
numbers represents the transmission serial number.
TRANSMISSION CHANGES AND PARTS
INTERCHANGEABILITY
1995 transmissions are similar to previous models
but only in appearance. Current transmissions are
dimensionally different. Do not interchange new/oldparts. Different dimensions, fluid passages, input/
output shafts, cases, bands, valve bodies and gover-
nor assemblies are just a few of the changed items.
CAUTION: Special bolts are used to attach the
driveplate to the crankshaft on models with a 2.5L
engine and 30RH transmission,. These bolts have a
smaller hex head for torque converter clearance.
DO NOT interchange these bolts with similar size
bolts for any reason.
Different governor weight assemblies are used in
30RH/32RH transmissions. The 30RH weight assem-
bly is much the same as in previous years. However,
the 32RH has a three stage governor weight assem-
bly consisting of the outer weight, a smaller weight
spring, and a new intermediate weight. Refer to the
overhaul and in-vehicle service sections for more de-
tailed information.
Plastic check balls are now used in many 30RH/
32RH valve bodies. The new check balls entered pro-
duction as a running change. Plastic and steel check
balls are not interchangeable.
A converter drainback check valve has been added
to the fluid cooler system. The one-way valve is lo-
cated in the transmission outlet (pressure) line. The
valve prevents fluid drainback when the vehicle is
parked for lengthy periods.
TRANSMISSION CONTROLS AND COMPONENTS
The transmission hydraulic control system per-
forms five basic functions, which are:
²pressure supply
²pressure regulation
²flow control
²clutch/band apply and release
²lubrication
Pressure Supply And Regulation
The oil pump generates the fluid working pressure
needed for operation and lubrication. The pump is
J30RH/32RH AUTOMATIC TRANSMISSION 21 - 67

driven by the torque converter. The converter is con-
nected to the engine crankshaft through the drive-
plate.
The pressure regulator valve maintains line pres-
sure. The regulator valve is located in the valve body.
The amount of line pressure developed is controlled
by throttle pressure, which is dependent on the de-
gree of throttle opening.
The governor valve is operated by the transmission
output shaft. Governor pressure increases approxi-
mately in proportion to vehicle speed.
The throttle valve determines line pressure and
shift speed. The throttle valve also controls upshift
and downshift speeds by regulating pressure in con-
junction with throttle position.
Shift Valves
The manual valve is operated by the gearshift link-
age and provides the operating range selected by the
driver.
The 1-2 shift valve provides automatic 1-2 or 2-1
shifts and the 2-3 shift valve provides automatic 2-3
or 3-2 shifts. The kickdown valve provides forced 3-2
or 3-1 downshifts depending on vehicle speed. Down-
shifts occur when the throttle is opened beyond
downshift detent position which is just before wide
open throttle.
The 2-3 valve throttle pressure plug provides 3-2
downshifts with varying throttle openings and de-
pending on vehicle speed. The 1-2 shift control valve
transmits 1-2 shift pressure to the accumulator pis-
ton to control kickdown band capacity on 1-2 upshifts
and 3-2 downshifts.The shuttle valve has two functions. First is fast
front band release and smooth engagement during
lift-foot 2-3 upshifts. The second is to regulate front
clutch and band application during 3-2 downshifts.
Clutches-Bands-Servos-Accumulator
The front/rear clutch pistons and servo pistons are
actuated by line pressure. When line pressure is re-
moved, the pistons are released by spring tension.
On 2-3 upshifts, the front servo piston is released
by spring tension and hydraulic pressure. The accu-
mulator controls hydraulic pressure on the apply side
of the front servo during 1-2 upshifts and at all
throttle openings.
Converter Clutch Controls
Converter clutch operation is controlled by the
power train control module, and by the solenoid and
clutch module on the valve body. The solenoid is op-
erated by a relay on the engine compartment side of
the dash panel.
Activating the solenoid opens a vent allowing fluid
to flow into the clutch module. When line pressure
exceeds tension of the module valve springs, the
module valves open. This allows fluid to be chan-
neled to the converter clutch through the reaction
shaft support and transmission shaft.
Gearshift And Park Lock Controls
The gearshift lever provides six operating positions:
Park (P), Reverse (R), Neutral (N), and the D, 2 and
1 forward drive ranges.
Manual 1 position provides first gear only. Overrun
braking occurs in 1 range when the throttle is re-
leased. Upshifts are not provided in 1 range.
Manual 2 range provides first and second gear. A
1-2 upshift will take place but a 2-3 upshift will not
occur.
D position provides 1-2, 2-3 upshifts and 3-2 and
3-1 downshifts.
Park position allows the park rod to move the park
pawl into engagement with the park gear. This pre-
vents rotation of the transmission output shaft. The
park lock mechanism is only engaged when the shift
lever is in the Park detent.
A park/neutral position switch controls engine
starting. The switch is designed to allow engine
starts only in park or neutral positions.
Fig. 2 Transmission Identification
J30RH/32RH AUTOMATIC TRANSMISSION 21 - 69

CONVERTER STALL TEST
Stall testing involves determining maximum engine
rpm obtainable at full throttle with the rear wheels
locked and the transmission in D range. This test
checks the holding ability of the converter overrun-
ning clutch and both of the transmission clutches.
When stall testing is completed, refer to the Stall
Speed Specifications chart and Stall Speed Diagnosis
guides.
WARNING: NEVER ALLOW ANYONE TO STAND IN
FRONT OF THE VEHICLE DURING A STALL TEST.
ALWAYS BLOCK THE FRONT WHEELS AND APPLY
THE SERVICE AND PARKING BRAKES DURING
THE TEST.
STALL TEST PROCEDURE
(1) Connect tachometer to engine.
(2) Check and adjust transmission fluid level.
(3) Start and run engine until transmission fluid
reaches normal operating temperature.
(4) Block front wheels.
(5) Fully apply service and parking brakes.
(6) Open throttle completely and record maximum
engine rpm registered on tachometer. It will take
from 3 to 10 seconds to reach maximum rpm. How-
ever, once maximum rpm has been achieved,do not
hold wide open throttle for more than 5 sec-
onds.
CAUTION: Stalling the converter causes a rapid in-
crease in fluid temperature. To avoid fluid overheat-
ing, hold wide open throttle for no more than 5
seconds after reaching peak rpm. In addition, if
more than one stall test is required, run the engine
at 1000 rpm with the transmission in Neutral for at
least 20 seconds to cool the fluid.
(7) Stall speeds should be in 1700-2150 rpm range.
CAUTION: If engine exceeds 2150 rpm, release ac-
celerator pedal immediately as transmission clutch
slippage is occurring.
(8) Shift transmission into Neutral. Run engine for
20-30 seconds at 1000 rpm to cool fluid. Then stop
engine, shift transmission into Park and release
brakes.
(9) Refer to Stall Test Diagnosis.
STALL TEST DIAGNOSIS
Stall Speed Too Low
Low stall speeds with a properly tuned engine in-
dicate a torque converter overrunning clutch prob-
lem. The condition should be confirmed by road
testing prior to converter replacement.The converter overrunning clutch is slipping when
stall speeds are 250 to 350 rpm below specified min-
imum.
A converter overrunning clutch failure will result
in sluggish acceleration in all speed ranges. It will
also require greater than normal throttle opening to
maintain cruising speeds.
Stall Speed Too High
If stall speed exceeds 2150 rpm, transmission
clutch slippage is occurring.
Stall Speed Normal But Acceleration Is Sluggish
If stall speeds are within specified range but abnor-
mal throttle opening is required for acceleration, or
to maintain cruise speeds, the converter overrunning
clutch is seized. The torque converter will have to be
replaced.
Converter Noise During Test
A whining noise caused by fluid flow is normal dur-
ing a stall test. However, loud metallic noises indi-
cate a damaged converter. To confirm that noise is
originating from the converter, operate the vehicle at
light throttle in Drive and Neutral on a hoist and lis-
ten for noise from the converter housing.
AIR PRESSURE TEST
Air pressure testing can be used to check clutch
and band operation with the transmission either in
the vehicle, or on the work bench as a final check af-
ter overhaul.
Air pressure testing requires that the oil pan and
valve body be removed from the transmission.
The servo and clutch apply passages are shown in
Figure 8.
Air Test Procedure
(1) Place one or two fingers on the clutch housing
and apply air pressure through front clutch apply
passage (Fig. 8). Piston movement can be felt and a
soft thud heard as the clutch applies.
(2) Place one or two fingers on the clutch housing
and apply air pressure through rear clutch apply
passage (Fig. 8). Piston movement can be felt and a
soft thud heard as the clutch applies.
(3) Apply air pressure to the front servo apply pas-
sage. The servo rod should extend and cause the
band to tighten around the drum. Spring tension
should release the servo when air pressure is re-
moved.
(4) Apply air pressure to the rear servo apply pas-
sage. The servo rod should extend and cause the
band to tighten around the drum. Spring tension
should release the servo when air pressure is re-
moved.
21 - 74 30RH/32RH TRANSMISSION DIAGNOSISJ

LEAK TESTING WITH AIR PRESSURE
This test involves closing off the transmission open-
ings and pressurizing the transmission to 8 psi with
Air Pump Tool 7700.
A soapy water solution is applied to suspected leak
points before and during the pressure test. Leaks will
be indicated by the presence of air bubbles coming
through the solution.
Some transmission openings such as the fill tube
and front cooler line fitting can be closed off with a
rubber plug or similar device. Plugs can secured with
wire or duct tape.
The transmission rear output shaft opening is
closed off simply by leaving the transfer case bolted
in place. However, if the transfer case has been re-
moved, a shipping plug can used to close off this
opening.
The torque converter hub opening in the pump and
the pump vent require special tools to close them off.
The converter hub seal cap is made from thin wall
tube anda3mm(1/8 in.) thick disc (Fig. 12). A re-
taining strap is needed to secure the seal cup for
testing. The strap can be made from 32 mm (1-1/4
in.) wide stock (Fig. 13). The strap attaching hole po-
sitions are approximate only. Measure hole position
on the converter housing before drilling.
The pump vent tool is made from 6 mm (1/4 in.)
rod and 5 mm (3/16 in.) plate (Fig. 14). The fabri-
cated tools can all be made from mild steel or alumi-
num stock.
AIR PRESSURE LEAK TEST PROCEDURE
(1) Install vent plug, converter hub seal cup and
cup retaining strap (Fig. 15).
(2) Close off remaining transmission openings with
rubber plugs, or stoppers.Do not close off rear
cooler line fitting. Air pump will be attached to
this fitting.(3) Attach Air Pump 7700 to rear cooler line fit-
ting. Connect length of copper tube to fitting. Then
attach air pump hose to tube with hose clamp (Fig.
16).
Fig. 11 Pump Area Inspection PointsFig. 12 Converter Hub Seal Cup
Fig. 13 Seal Cup Retaining Strap
Fig. 14 Pump Vent Plug
21 - 76 30RH/32RH TRANSMISSION DIAGNOSISJ

(4) Apply thick soapy water solution to suspected
leak areas.
CAUTION: The recommended test pressure is 8 psi.
The maximum allowable test pressure is 10 psi. Do
not exceed specified test pressure.
(5) Pressurize transmission to 8 psi with air pump.
(6) Observe suspected leak areas. Air bubbles ap-
pearing in soapy water solution indicate leak points.
(7) Remove test tools and plugs after test comple-
tion and make necessary repairs as described in Leak
Correction procedure.
CONVERTER HOUSING AREA LEAK
CORRECTION
(1) Remove converter.
(2) Tighten front band adjusting screw until band
is tight around clutch retainer. This prevents
clutches from coming out when oil pump is removed.
(3) Remove oil pump and seal. Inspect pump hous-
ing drainback and vent holes for obstructions. Clear
holes with solvent and wire.(4) Inspect pump bushing and converter hub. If
bushing is scored, replace it. If converter hub is
scored, either polish it with crocus cloth or replace
converter if scoring is severe.
(5) Install new pump seal, O-ring, gasket, bushing.
Replace oil pump if cracked, porous or damaged in
any way.
(6) Loosen kickdown lever pin plug two turns. Ap-
ply Permatex No. 2 or equivalent to plug threads and
tighten plug to 17 Nzm (150 in-lbs) torque.
(7) Adjust front band.
(8) Lubricate pump seal and converter hub with
transmission fluid or petroleum jelly and install con-
verter.
(9) Install transmission.
(10) Install converter housing dust shield and
lower vehicle.
DIAGNOSIS GUIDES AND CHARTS
The diagnosis charts provide additional reference
for transmission and converter clutch diagnosis.
The hydraulic flow charts outline fluid flow and hy-
draulic circuitry. Circuit operation is provided for all
gear ranges. Normal working pressures are also sup-
plied for each of the various gear ranges.
Fig. 15 Vent Plug And Hub Seal Cup Installation
Fig. 16 Pressurizing Transmission
J30RH/32RH TRANSMISSION DIAGNOSIS 21 - 77