servo CHRYSLER VOYAGER 1996 Owners Manual

REMOTE POWER STEERING FLUID RESERVOIR
REMOVE
(1) Remove the filler cap from remote power steer-
ing fluid reservoir (Fig. 31).
(2) Raise vehicle on jack stands or centered on a
frame contact type hoist. See Hoisting in the Lubri-
cation and Maintenance section of this service man-
ual, for the required lifting procedure to be used for
this vehicle.
(3) Remove at power steering pump, the power
steering fluid hose coming from the power steering
fluid reservoir. Let the power steering fluid drain out
of the reservoir and hose.
(4) Lower vehicle.
(5) Remove the fluid supply hose (Fig. 31) from the
remote power steering fluid reservoir.
(6) Remove the 2 mounting screws (Fig. 31)
attaching the remote fluid reservoir to the inner
fender.
(7) Remove remote reservoir from inner fender.
INSTALL
(1) Install remote power steering fluid reservoir on
inner fender, by first inserting tab on reservoir into
hole in inner fender. Then rotate reservoir so mount-
ing tabs are against inner fender.
(2) Install and securely tighten the 2 reservoir
mounting screws (Fig. 31).
CAUTION: The power steering fluid reservoir to
power steering pump supply hose must be routed
tightly against the strut tower and parallel to the
dash panel. It must also be routed under the wiring
harness and below the drip tube. This will prevent
the hose from coming in contact with the accessory
drive belt. The power steering fluid supply hose
must be located in its correct position by clipping it
to the stud in the strut tower (Fig. 32).(3) Install the fluid supply hose onto the power
steering fluid reservoir fitting (Fig. 31). Install the
hose clamp on the fluid supply hose at the fluid res-
ervoir.Be sure hose clamp in installed past bead
on fluid reservoir fitting.
(4) Raise vehicle on jack stands or centered on a
frame contact type hoist. See Hoisting in the Lubri-
cation and Maintenance section of this service man-
ual, for the required lifting procedure to be used for
this vehicle.
(5) Install power steering fluid supply hose on
power steering pump. Install the hose clamp on the
fluid supply hose at the power steering pump.Be
sure hose clamp in installed past bead on pump
fitting.
(6) Lower vehicle.
(7) Install routing clip for power steering fluid sup-
ply hose on stud in strut tower (Fig. 32).
(8) Fill the remote fluid reservoir to the proper
level and let the fluid settle for at least two (2) min-
utes.
(9) Start the engine and let run for a few seconds.
Then turn the engine off.
(10) Add fluid if necessary. Repeat the above pro-
cedure until the fluid level remains constant after
running the engine.
(11) Raise the front wheels off the ground.
(12) Start the engine. Slowly turn the steering
wheel right and left, lightly contacting the wheel
stops.
(13) Add power steering fluid if necessary.
(14) Lower the vehicle and turn the steering wheel
slowly from lock to lock.
(15) Stop the engine. Check the fluid level and
refill as required.
(16) If the fluid is extremely foamy, allow the vehi-
cle to stand a few minutes and repeat the above pro-
cedure.
Fig. 31 Remote Power Steering Fluid Reservoir
Fig. 32 Power Steering Fluid Hose Routing Clip
19 - 22 STEERINGNS
REMOVAL AND INSTALLATION (Continued)

DISASSEMBLY AND ASSEMBLY
POWER STEERING PUMP PULLEY
DISASSEMBLY
(1) Remove the pulley from the shaft of the power
steering pump using Puller C-4333 or C-4068 (Fig.
33).
CAUTION: Do not hammer on power steering
pump pulley. This will damage the pulley and the
power steering pump.
(2) Replace pulley if it is found to be bent, cracked,
or loose.
ASSEMBLY
(1) Install the pulley with Installer C-4063 (Fig.
34). Do not use the tool adapters.
(2) Ensure that the tool and the pulley remain
aligned with the pump shaft. Prevent the pulley from
being cocked on the shaft.(3) Force pulley flush with the end of the power
steering pump shaft (Fig. 35).
(4) With serpentine belts, run engine until warm
(5 min.) and note any belt chirp. If chirp exists, move
pulley outward approximately 0.5 mm (0.020 in.). If
noise increases, press on 1.0 mm (0.040 in.).Be
careful that pulley does not contact mounting
bolts.
POWER STEERING PUMP FLOW CONTROL VALVE
SEAL
DISASSEMBLE
WARNING: POWER STEERING OIL, ENGINE
PARTS AND THE EXHAUST SYSTEM MAY BE
EXTREMELY HOT IF ENGINE HAS BEEN RUNNING.
DO NOT START ENGINE WITH ANY LOOSE OR DIS-
CONNECTED HOSES. DO NOT ALLOW HOSES TO
TOUCH HOT EXHAUST MANIFOLD OR CATALYST.
(1) Remove cap from power steering fluid reser-
voir.
(2) Using a siphon pump, remove as much power
steering fluid as possible from the power steering
fluid reservoir.
(3) Raise vehicle See Hoisting, Group 0. Put oil
drain pan under vehicle to catch power steering fluid.
(4) Raise the heat sleeve (Fig. 36) on the power
steering return hose to expose the return hose to
steel tube connection. Remove hose clamp from
power steering fluid return hose (Fig. 36). Remove
power steering return hose from steel tube and allow
remaining power steering fluid to drain from power
steering pump and reservoir.
(5) Remove the power steering fluid pressure line
from the power steering pump pressure fitting (Fig.
37). Drain excess power steering fluid from hose.
Fig. 33 Pulley Removal
Fig. 34 Pulley Installation
Fig. 35 Pulley To Pump Shaft Location
NSSTEERING 19 - 23

(1) Remove cap from power steering fluid reser-
voir.
(2) Using a siphon pump, remove as much power
steering fluid as possible from the power steering
fluid reservoir.
(3) With the ignition key in the locked position
turn the steering wheel to the left until the steering
wheel is in the locked position.
(4) With the vehicle on the ground, disconnect the
steering column shaft coupler from the steering gear
intermediate coupler (Fig. 3).
(5) Raise vehicle on jack stands or centered on a
frame contact type hoist. See Hoisting in the Lubri-
cation and Maintenance section of this service man-
ual, for the required lifting procedure to be used for
this vehicle.
(6) Remove the front tires.
(7) Raise the heat sleeve (Fig. 4) on the power
steering return hose to expose the return hose to
steel tube connection. Remove the return hose from
the metal tube of the power steering fluid return line
(Fig. 4). Then allow the remaining power steering
fluid to drain from the system through the hose and
metal tube.
(8) Remove nut attaching outer tie rod end to
steering knuckle (Fig. 5).Nut is to be removed
from tie rod end using the following procedure,
hold tie rod end stud with a 11/32 socket while
loosening and removing nut with wrench.
(9) Remove both tie rod ends from steering knuck-
les, using Puller Special Tool MB-990635 or
MB-991113 (Fig. 6).
Fig. 3 Steering Column Shaft To Intermediate Shaft
Attachment
Fig. 4 Power Steering Fluid Return Hose
Connection
Fig. 5 Removing/Installing Tie Rod End Attaching
Nut
Fig. 6 Tie Rod End Removal From Steering Knuckle
19 - 28 STEERINGNS
REMOVAL AND INSTALLATION (Continued)

CAUTION: Proper torque on the cradle plate to
suspension cradle mounting bolts is very impor-
tant.
(8) Install cradle plate on front suspension cradle
and install the 10 cradle plate to cradle attaching
bolts and nuts (Fig. 8). Tighten all attaching bolts to
a torque of 165 N´m (123 ft. lbs.).
(9) Install the bracket (Fig. 9) attaching the power
steering fluid tubes to the front suspension cradle.
CAUTION:
(10) Install the power steering fluid return hose on
the steel tube at the front suspension cradle (Fig. 4).
(11) Install a screw type hose clamp on the power
steering hose to steel tube connection.Be sure hose
clamp is installed on return tube past the upset
bead on the tube.Tighten the screw clamp to a
torque of 2 N´m (18 in. lbs.).
CAUTION: The protective heat shield sleeves must
cover the entire rubber hose and hose to tube con-
nection portion of both the power steering fluid
pressure and return hoses (Fig. 4). This is required
to prevent the power steering hoses from being
overheated.
(12) When used, properly position the protective
heat sleeves on the power steering hoses. Then, tie
strap the heat sleeves to the power steering hoses to
keep them in their proper position.
(13) Install the front tire and wheel assemblies on
vehicle. Install the wheel lug nuts and torque to 129
N´m (95 ft. lbs.).
(14) Lower the vehicle to a level were the interior
of vehicle is accessible.
(15) Using the intermediate coupler, turn the front
wheels of the vehicle to the left until the intermedi-
ate coupler shaft is properly aligned with the steer-
ing column coupler. Assemble the steering column
shaft coupler (Fig. 3) onto the steering gear interme-
diate coupler. Install steering column coupler to
intermediate shaft retaining pinch bolt (Fig. 3).
Tighten the pinch bolt nut to a torque of 28 N´m (250
in. lbs.).
CAUTION: Do not use automatic transmission fluid
in the power steering system. Only use Mopar,
Power Steering Fluid or an exact equivalent prod-
uct.
(16) Fill power steering pump fluid reservoir to the
proper level.
(17) Start the engine and let run for a few seconds.
Then turn the engine off.(18) Add fluid if necessary. Repeat the above pro-
cedure until the fluid level remains constant after
running the engine.
(19) Raise front wheels of vehicle off the ground.
(20) Start the engine. Slowly turn the steering
wheel right and left, lightly contacting the wheel
stops. Then turn the engine off.
(21) Add power steering fluid if necessary.
(22) Lower the vehicle and turn the steering wheel
slowly from lock to lock.
(23) Stop the engine. Check the fluid level and
refill as required.
(24) If the fluid is extremely foamy, allow the vehi-
cle to stand a few minutes and repeat the above pro-
cedure.
(25) Fill power steering reservoir to correct level
with Mopart, Power Steering Fluid, or equivalent.
(26) Adjust toe (Refer to Group 2 Suspension).
DISASSEMBLY AND ASSEMBLY
STEERING GEAR INNER TIE ROD BOOT
DISASSEMBLE
NOTE: The removal and installation of the inner tie
rod boot must be performed with the steering gear
assembly removed from the vehicle.
(1) Loosen the inner to outer tie rod jam nut (Fig.
15). Remove the outer tie rod from the inner tie rod.
(2) Remove nut attaching the outer tie rod end to
the steering knuckle (Fig. 16).Nut is to be
removed from tie rod end using the following
procedure, hold tie rod end stud with an 11/32
socket, while loosening and removing nut with
wrench.
Fig. 15 Inner To Outer Tie Rod Jam Nut
NSSTEERING 19 - 31
REMOVAL AND INSTALLATION (Continued)

STEERING
CONTENTS
page
POWER STEERINGÐ2.5L VM DIESEL....... 1
POWER STEERINGÐ2.5L VM DIESEL
INDEX
page page
GENERAL INFORMATION
POWER STEERING GEAR................ 1
POWER STEERING PUMP................ 1
STEERING GEAR OPERATIONÐRHD & LHD
VEHICLES........................... 1SERVICE PROCEDURES
POWER STEERING PUMP ± INITIAL
OPERATION.......................... 1
REMOVAL AND INSTALLATION
POWER STEERING PUMPÐ2.5L DIESEL..... 2
GENERAL INFORMATION
POWER STEERING PUMP
The power steering pump used with the 2.5L VM
Diesel engine operates the same way as the power
steering pump used with the 2.5/4.0L gasoline
engines. Refer to the Description and Operation sec-
tion for the 2.5/4.0L gasoline engine power steering
pump for more information.
STEERING GEAR OPERATIONÐRHD & LHD
VEHICLES
NOTE: The power steering gear should NOT be ser-
viced or adjusted. If a malfunction or oil leak
occurs, the complete steering gear should be
replaced.
Refer to the Power Steering Gear in group 19 for
more information
POWER STEERING GEAR
SERVICE PROCEDURES
POWER STEERING PUMP ± INITIAL OPERATION
WARNING: THE FLUID LEVEL SHOULD BE
CHECKED WITH ENGINE OFF TO PREVENT INJURY
FROM MOVING COMPONENTS.CAUTION: Use MOPAR Power Steering Fluid or
equivalent. Do not use automatic transmission fluid
and do not overfill.
Wipe filler cap clean, then check the fluid level.
The dipstick should indicateCOLDwhen the fluid is
at normal temperature.
(1) Fill the pump fluid reservoir to the proper level
and let the fluid settle for at least two minutes.
(2) Start the engine and let run for a few seconds
then turn engine off.
(3) Add fluid if necessary. Repeat the above proce-
dure until the fluid level remains constant after run-
ning the engine.
Fig. 1 Power Steering GearÐRHD Vehicles
NS/GSSTEERING 19 - 1

TRANSAXLE AND POWER TRANSFER UNIT
CONTENTS
page page
31TH AUTOMATIC TRANSAXLE.............. 1
41TE AUTOMATIC TRANSAXLE............. 71POWER TRANSFER UNIT................. 165
31TH AUTOMATIC TRANSAXLE
INDEX
page page
GENERAL INFORMATION
31TH TRANSAXLE........................ 2
FLUID LEVEL AND CONDITION.............. 2
SELECTION OF LUBRICANT................ 3
SPECIAL ADDITIVES...................... 3
DESCRIPTION AND OPERATION
CLUTCHES, BAND SERVOS, AND
ACCUMULATOR
...................... 3
FLOW CONTROL VALVES.................. 3
GEARSHIFT AND PARKING LOCK CONTROLS . . 4
GOVERNOR............................. 4
HYDRAULIC CONTROL SYSTEM............. 3
PRESSURE REGULATING VALVES........... 3
PRESSURE SUPPLY SYSTEM............... 3
TORQUE CONVERTER CLUTCH SOLENOID
WIRING CONNECTOR................... 4
TORQUE CONVERTER CLUTCH............. 3
DIAGNOSIS AND TESTING
CLUTCH AND SERVO AIR PRESSURE TESTS . 15
FLUID LEAKAGE-TRANSAXLE TORQUE
CONVERTER HOUSING AREA............ 15
HYDRAULIC PRESSURE TESTS............ 13
ROAD TEST............................. 4
THREE SPEED TRANSAXLE DIAGNOSIS AND
TESTS............................... 4
SERVICE PROCEDURES
ALUMINUM THREAD REPAIR.............. 18
FLUID AND FILTER CHANGE............... 16
FLUID DRAIN AND REFILL................. 18
FLUSHING COOLERS AND TUBES.......... 18
OIL PUMP VOLUME CHECK............... 19
REMOVAL AND INSTALLATION
FRONT PUMP OIL SEAL.................. 21
PARK/NEUTRAL STARTING AND BACK-UP
LAMP SWITCH........................ 19
TRANSAXLE AND TORQUE CONVERTER
REMOVAL............................ 20
VEHICLE SPEED SENSOR PINION GEAR..... 19DISASSEMBLY AND ASSEMBLY
ACCUMULATOR-RECONDITION............ 36
DIFFERENTIAL REPAIR................... 46
FRONT CLUTCH-RECONDITION............ 32
FRONT PLANETARY & ANNULUS GEAR-
RECONDITION........................ 35
KICKDOWN SERVO (CONTROLLED LOAD)-
RECONDITION........................ 37
LOW/REVERSE (REAR)
SERVO-RECONDITION.................. 36
OIL PUMP-RECONDITION................. 31
OUTPUT SHAFT REPAIR.................. 43
PARKING PAWL......................... 42
REAR CLUTCH-RECONDITION............. 33
TRANSAXLE........................... 21
TRANSFER SHAFT REPAIR................ 38
VALVE BODY RECONDITION............... 27
CLEANING AND INSPECTION
VALVE BODY........................... 50
ADJUSTMENTS
BAND ADJUSTMENT..................... 51
BEARING ADJUSTMENT PROCEDURES...... 52
DIFFERENTIAL BEARING................. 53
GEARSHIFT CABLE ADJUSTMENT.......... 51
HYDRAULIC CONTROL PRESSURE
ADJUSTMENTS....................... 52
OUTPUT SHAFT BEARING................ 52
THROTTLE PRESSURE LINKAGE
ADJUSTMENT......................... 51
TRANSFER SHAFT BEARING.............. 54
SCHEMATICS AND DIAGRAMS
31TH TRANSAXLE HYDRAULIC SCHEMATIC . . 56
SPECIFICATIONS
31TH AUTOMATIC TRANSAXLE............. 64
31TH TORQUE SPECIFICATIONS........... 65
SPECIAL TOOLS
31TH AUTOMATIC TRANSAXLE............. 66
NSTRANSAXLE AND POWER TRANSFER UNIT 21 - 1

GENERAL INFORMATION
31TH TRANSAXLE
NOTE: Safety goggles should be worn at all times
when working on these transaxles.
This transaxle combines torque converter, three
speed transmission, final drive gearing, and differen-
tial into a front wheel drive system. The identifica-
tion markings and usage of the transaxle are charted
in Diagnosis and Tests.
NOTE: Transaxle operation requirements are differ-
ent for each vehicle and engine combination. Some
internal parts will be different to provide for this.
Therefore, when replacing parts, refer to the seven
digit part number stamped on rear of the transaxle
oil pan flange.
Within this transaxle, there are three primary
areas:
(1) Main center line plus valve body.
(2) Transfer shaft center line (includes governor
and parking sprag).
(3) Differential center line.
(4) Center distances between the main rotating
parts in these three areas are held precise to main-
tain a low noise level.
(5) The torque converter, transaxle area, and dif-
ferential are housed in an integral aluminum die
casting.The differential oil sump is common
with the transaxle sump. Separate filling of the
differential is NOT necessary.
(6) The torque converter is attached to the crank-
shaft through a flexible driving plate. Cooling of the
converter is accomplished by circulating the tran-
saxle fluid through a remote cooler. There are two
types of coolers used. An oil-to-water type cooler
located in the radiator side tank and/or an oil-to air
heat exchanger. The torque converter assembly is a
sealed unit that cannot be disassembled.
(7) The transaxle fluid is filtered by an internal fil-
ter attached to the lower side of the valve body
assembly.
(8) Engine torque is transmitted to the torque con-
verter then, through the input shaft to multiple-disc
clutches in the transaxle. The power flow depends on
the application of the clutches and bands. Refer to
Elements in Use Chart in Diagnosis and Tests sec-
tion.
(9) The transaxle consists of:
²Two multiple-disc clutches
²An overrunning clutch
²Two servos
²A hydraulic accumulator
²Two bands²Two planetary gear sets
This provides three forward ratios and a reverse
ratio. The common sun gear of the planetary gear
sets is connected to the front clutch by a driving
shell. The drive shell is splined to the sun gear and
front clutch retainer. The hydraulic system consists
of an oil pump, and a single valve body which con-
tains all of the valves except the governor valves.
The transaxle sump and differential sump are both
vented through the dipstick. Output torque from the
main center line is delivered through helical gears to
the transfer shaft. This gear set is a factor of the
final drive (axle) ratio. The shaft also carries the gov-
ernor and parking sprag. An integral helical gear on
the transfer shaft drives the differential ring gear.
The final drive gearing is completed with one of two
gear ratios of 2.98 or 3.19 depending on model and
application.
FLUID LEVEL AND CONDITION
NOTE: The transmission and differential sump have
a common oil sump with a communicating opening
between the two.
The torque converter fills in both the P Park and N
Neutral positions. Place the selector lever in P Park
to be sure that the fluid level check is accurate.The
engine should be running at idle speed for at
least one minute, with the vehicle on level
ground. This will assure complete oil level sta-
bilization between differential and transmis-
sion.The fluid should be at normal operating
temperature (approximately 82 C. or 180 F.). The
fluid level is correct if it is in the HOT region (cross-
hatched area) on the dipstick.
Low fluid level can cause a variety of conditions
because it allows the pump to take in air along with
the fluid. As in any hydraulic system, air bubbles
make the fluid spongy, therefore, pressures will be
low and build up slowly.
Improper filling can also raise the fluid level too
high. When the transaxle has too much fluid, the
gears churn up foam and cause the same conditions
which occur with a low fluid level.
In either case, the air bubbles can cause overheat-
ing, fluid oxidation, and varnishing. This can inter-
fere with normal valve, clutch, and servo operation.
Foaming can also result in fluid escaping from the
transaxle dipstick where it may be mistaken for a
leak.
Along with fluid level, it is important to check the
condition of the fluid. When the fluid smells burned,
and is contaminated with metal or friction material
particles, a complete transaxle overhaul is needed.
Be sure to examine the fluid on the dipstick closely.
21 - 2 TRANSAXLE AND POWER TRANSFER UNITNS

If there is any doubt about its condition, drain out a
sample for a double check.
SELECTION OF LUBRICANT
It is important that the proper lubricant be used in
these transmissions. Mopar ATF PLUS 3 (Automatic
Transmission Fluid- type 7176) should be used to aid
in ensuring optimum transmission performance. It is
important that the transmission fluid be maintained
at the prescribed level using the recommended fluids.
SPECIAL ADDITIVES
Chrysler Corporation does not recommend the
addition of any fluids to the transmission, other than
fluid listed above. An exception to this policy is the
use of special dyes to aid in detecting fluid leaks. The
use of transmission sealers should be avoided, since
they may adversely affect seals.
DESCRIPTION AND OPERATION
TORQUE CONVERTER CLUTCH
A torque converter clutch is standard on all vehi-
cles. The torque converter clutch is activated only in
direct drive and is controlled by the engine electron-
ics. A solenoid on the valve body, is powered by the
powertrain control module to activate torque con-
verter clutch.
HYDRAULIC CONTROL SYSTEM
The hydraulic control system makes the transaxle
fully automatic, and has four important functions to
perform. The components of any automatic control
system may be grouped into the following basic
groups:
The pressure supply system, the pressure regulat-
ing valves, the flow control valves, the clutches, and
band servos.
Taking each of these basic groups or systems in
turn, the control system may be described as follows:
PRESSURE SUPPLY SYSTEM
The pressure supply system consists of an oil pump
driven by the engine through the torque converter.
The single pump furnishes pressure for all the
hydraulic and lubrication requirements.Oil pump
housing assemblies are available with prese-
lected pump gears.
PRESSURE REGULATING VALVES
The pressure regulating valve controls line pres-
sure dependent on throttle opening. The governor
valve transmits regulated pressure to the valve body
(in conjunction with vehicle speed) to control upshift
and downshift.The throttle valve transmits regulated pressure to
the transaxle (dependent on throttle position) to con-
trol upshift and downshift.
FLOW CONTROL VALVES
The manual valve provides the different transaxle
drive ranges as selected by the vehicle operator.
The 1-2 shift valve automatically shifts the tran-
saxle from first to second or from second to first,
depending on the vehicle operation.
The 2-3 shift valve automatically shifts the tran-
saxle from second to third or from third to second
depending on the vehicle operation.
The kickdown valve makes possible a forced down-
shift from third to second, second to first, or third to
first (depending on vehicle speed). This can be done
by depressing the accelerator pedal past the detent
feel near wide open throttle.
The shuttle valve has two separate functions and
performs each independently of the other. The first is
providing fast release of the kickdown band, and
smooth front clutch engagement when a lift-foot
upshift from second to third is made. The second
function is to regulate the application of the kick-
down servo and band when making third to second
kickdown.
The by-pass valve provides for smooth application
of the kickdown band on 1-2 upshifts.
The torque converter clutch solenoid allows for the
electronic control of the torque converter clutch. It
also disengages the torque converter at closed throt-
tle. This is done during engine warm-up, and part-
throttle acceleration.
The switch valve directs oil to apply the torque
converter clutch in one position. The switch valve
releases the torque converter clutch in the other posi-
tion.
CLUTCHES, BAND SERVOS, AND ACCUMULATOR
The front and rear clutch pistons, and both servo
pistons are moved hydraulically to engage the
clutches and apply the bands. The pistons are
released by spring tension when hydraulic pressure
is released. On the 2-3 upshift, the kickdown servo
piston is released by spring tension and hydraulic
pressure.
The accumulator controls the hydraulic pressure
on the apply side of the kickdown servo during the
1-2 upshift; thereby, cushioning the kickdown band
application at any throttle position.
NSTRANSAXLE AND POWER TRANSFER UNIT 21 - 3
GENERAL INFORMATION (Continued)

may not be detected. Practically any condition can be
caused by leaking hydraulic circuits or sticking
valves.
Therefore, unless the condition is obvious, the tran-
saxle should never be disassembled until hydraulic
pressure tests have been performed.
HYDRAULIC PRESSURE TESTS
Pressure testing is a very important step in the
diagnostic procedure. These tests usually reveal the
cause of most transaxle problems.
Before performing pressure tests, be certain that
fluid level and condition, and control cable adjust-
ments have been checked and approved. Fluid must
be at operating temperature (150 to 200 degrees F.).
Install an engine tachometer, raise vehicle on hoist
which allows front wheels to turn, and position
tachometer so it can be read.
Disconnect throttle cable and shift cable from tran-
saxle levers so they can be controlled from outside
the vehicle.
Attach 150 psi gauges to ports required for test
being conducted. A 300 psi gauge (C-3293) is required
for reverse pressure test at rear servo.
Test port locations are shown in (Fig. 2) .
TEST ONE (SELECTOR IN 1)
(1) Attach gauges to line and low-reverse ports.
(2) Operate engine at 1000 rpm for test.
(3) Move selector lever on transaxle all the way
rearward (1 position).
(4) Read pressures on both gauges as throttle lever
on transaxle is moved from full clockwise position to
full counterclockwise position.
(5) Line pressure should read 52 to 58 psi with
throttle lever clockwise. Pressure should gradually
increase, as lever is moved counterclockwise, to 80 to
88 psi.(6) Low-reverse pressure should read the same as
line pressure within 3 psi.
(7) This tests pump output, pressure regulation,
and condition of rear clutch and rear servo hydraulic
circuits.
TEST TWO (SELECTOR IN 2)
(1) Attach one gauge to line pressure port and tee
another gauge into lower cooler line fitting. This will
allow lubrication pressure readings to be taken..
(2) Operate engine at 1000 rpm for test.
(3) Move selector lever on transaxle one detent for-
ward from full rearward position. This is selector 2
position.
(4) Read pressures on both gauges as throttle lever
on transaxle is moved from full clockwise position to
full counterclockwise position.
(5) Line pressure should read 52 to 58 psi with
throttle lever clockwise. Pressure should gradually
increase, as lever is moved counterclockwise, to 80 to
88 psi.
(6) Lubrication pressure should be 10 to 25 psi
with lever clockwise and 10 to 35 psi with lever full
counterclockwise.
(7) This tests pump output, pressure regulation,
and condition of rear clutch and lubrication hydraulic
circuits.
TEST THREE (SELECTOR IN D)
(1) Attach gauges to line and kickdown release
ports.
(2) Operate engine at 1600 rpm for test.
(3) Move selector lever on transaxle two detents
forward from full rearward position. This is selector
D position.
(4) Read pressures on both gauges as throttle lever
on transaxle is moved from full clockwise position to
full counterclockwise position.
(5) Line pressure should read 52 to 58 psi with
throttle lever clockwise. Pressure should gradually
ELEMENTS IN USE AT EACH POSITION OF THE SELECTOR LEVER
NSTRANSAXLE AND POWER TRANSFER UNIT 21 - 13
DIAGNOSIS AND TESTING (Continued)

increase, as lever is moved counterclockwise to 80 to
88 psi.
(6) Kickdown release is pressurized only in direct
drive and should be same as line pressure within 3
psi, up to kickdown point.
(7) This tests pump output, pressure regulation,
and condition of rear clutch, front clutch, and
hydraulic circuits.
TEST FOUR (SELECTOR IN REVERSE)
(1) Attach 300 psi gauge to low-reverse port.
(2) Operate engine at 1600 rpm for test.
(3) Move selector lever on transaxle four detents
forward from full rearward position. This is selector
R position.
(4) Low-reverse pressure should read 180 to 220
psi with throttle lever clockwise. Pressure should
gradually increase, as lever is moved counterclock-
wise to 260 to 300 psi.
(5) This tests pump output, pressure regulation,
and condition of front clutch and rear servo hydraulic
circuits.
(6) Move selector lever on transaxle to D position
to check that low-reverse pressure drops to zero.
(7) This tests for leakage into rear servo, due to
case porosity, which can cause reverse band burn out.
TEST RESULT INDICATIONS
(1) If proper line pressure, minimum to maximum,
is found in any one test, the pump and pressure reg-
ulator are working properly.
(2) Low pressure in D, 1, and 2 but correct pres-
sure in R indicates rear clutch circuit leakage.
(3) Low pressure in D and R but correct pressure
in 1 indicates front clutch circuit leakage.
Fig. 2 Test Port Locations
Fig. 3 Governor Pressure Tap
21 - 14 TRANSAXLE AND POWER TRANSFER UNITNS
DIAGNOSIS AND TESTING (Continued)